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8 | <title> GoJS in Node.js -- Northwoods Software </title>
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23 | font-bold text-2xl lg:text-4xl rounded-lg hover:bg-nwoods-secondary " href="../">
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24 | <h1 class="mb-0 p-1 ">GoJS</h1>
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45 | target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/sales/index.html', 'buy');">Buy</a></li>
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46 | </ul>
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63 | <nav id="navList" class="min-h-screen hidden md:block sidebar-nav flex-grow px-1 lg:px-4 pb-4 md:pb-0 md:overflow-y-auto break-words">
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64 | <a href="index.html">Basics</a>
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65 | <a href="buildingObjects.html">Building Parts</a>
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66 | <a href="usingModels.html">Using Models</a>
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67 | <a href="dataBinding.html">Data Binding</a>
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68 | <a href="react.html">GoJS with React</a>
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69 | <a href="angular.html">GoJS with Angular</a>
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70 | <a href="textBlocks.html">TextBlocks</a>
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71 | <a href="shapes.html">Shapes</a>
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72 | <a href="pictures.html">Pictures</a>
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73 | <a href="panels.html">Panels</a>
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74 | <a href="tablePanels.html">Table Panels</a>
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75 | <a href="brush.html">Brushes</a>
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76 | <a href="sizing.html">Sizing Objects</a>
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77 | <a href="itemArrays.html">Item Arrays</a>
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78 | <a href="changedEvents.html">Changed Events</a>
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79 | <a href="transactions.html">Transactions</a>
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80 | <a href="viewport.html">Coordinates</a>
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81 | <a href="initialView.html">Initial View</a>
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82 | <a href="collections.html">Collections</a>
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83 | <a href="links.html">Links</a>
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84 | <a href="linkLabels.html">Link Labels</a>
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85 | <a href="connectionPoints.html">Link Points</a>
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86 | <a href="ports.html">Ports</a>
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87 | <a href="nodes.html">Nodes</a>
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88 | <a href="debugging.html">Debugging</a>
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89 | <a href="layouts.html">Layouts</a>
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90 | <a href="trees.html">Trees</a>
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91 | <a href="subtrees.html">SubTrees</a>
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92 | <a href="groups.html">Groups</a>
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93 | <a href="subgraphs.html">SubGraphs</a>
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94 | <a href="sizedGroups.html">Sized Groups</a>
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95 | <a href="selection.html">Selection</a>
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96 | <a href="highlighting.html">Highlighting</a>
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97 | <a href="animation.html">Animation</a>
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98 | <a href="toolTips.html">ToolTips</a>
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99 | <a href="contextmenus.html">Context Menus</a>
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100 | <a href="events.html">Diagram Events</a>
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101 | <a href="tools.html">Tools</a>
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102 | <a href="commands.html">Commands</a>
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103 | <a href="permissions.html">Permissions</a>
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104 | <a href="validation.html">Validation</a>
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105 | <a href="HTMLInteraction.html">HTML Interaction</a>
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106 | <a href="layers.html">Layers & Z-ordering</a>
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107 | <a href="palette.html">Palette</a>
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108 | <a href="overview.html">Overview</a>
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109 | <a href="resizing.html">Resizing Diagrams</a>
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110 | <a href="replacingDeleting.html">Replacing and Deleting</a>
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111 | <a href="buttons.html">Buttons</a>
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112 | <a href="templateMaps.html">Template Maps</a>
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113 | <a href="legends.html">Legends and Titles</a>
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114 | <a href="extensions.html">Extensions</a>
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115 | <a href="geometry.html">Geometry Strings</a>
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116 | <a href="grids.html">Grid Patterns</a>
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117 | <a href="graduatedPanels.html">Graduated Panels</a>
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118 | <a href="makingImages.html">Diagram Images</a>
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119 | <a href="makingSVG.html">Diagram SVG</a>
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120 | <a href="printing.html">Printing</a>
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121 | <a href="serverSideImages.html">Server-side Images</a>
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122 | <a href="nodeScript.html">GoJS in Node.js</a>
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123 | <a href="testing.html">Testing</a>
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124 | <a href="storage.html">Storage</a>
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125 | <a href="performance.html">Performance</a>
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126 | <a href="source.html">Building from Source</a>
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127 | <a href="platforms.html">Platforms</a>
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128 | <a href="deployment.html">Deployment</a>
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129 | </nav>
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130 | </div>
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131 | <div class="pt-4 px-2 md:px-0 lg:px-4 pb-16 w-full overflow-hidden">
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132 |
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133 |
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134 |
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135 | <div id="container" class="container-fluid">
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136 | <div id="content">
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137 | <h1>Using GoJS with Node.js</h1>
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138 |
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139 | <p>
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140 | As of 2.0, GoJS can be used in DOM-less contexts like Node.js. However there are some considerations:
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141 | <ul>
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142 | <li>
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143 | Since there is no Diagram DIV, you must instead set the <a>Diagram.viewSize</a> property.
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144 | This affects all the same values as the DIV size, like Diagram.position and layout results from layouts that are viewport-sized.
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145 | </li>
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146 | <li>Cannot measure go.Pictures, you must set a <a>GraphObject.desiredSize</a> instead.</li>
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147 | <li>Cannot measure go.TextBlocks accurately, you should set a <a>GraphObject.desiredSize</a> instead.</li></li>
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148 | </ul>
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149 | </p>
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150 |
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151 | <p>
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152 | For server-side operations that need to measure Pictures or TextBlocks, you should consider using a headless browser with Node.
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153 | <a href="serverSideImages.html">Click here for examples using Node with Puppeteer (headless Chrome)</a>.
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154 | </p>
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155 |
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156 | <h2 id="NodeJSExample">Node.js example</h2>
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157 |
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158 | <p>
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159 | If you saved the following JavaScript as <code>nodescript.js</code> and run it with node (<code>node nodescript.js</code>),
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160 | it will output Model JSON results in the console, which include the locations of laid-out Nodes. You can use Node.js
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161 | in this way to do server-side operations like large layouts, and then send the JSON to the client.
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162 | </p>
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163 |
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164 | <pre class="lang-js"><code>
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165 | // nodescript.js
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166 | // This example loads the GoJS library, creates a Diagram with a layout and prints the JSON results.
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167 |
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168 | // Load GoJS. This assumes using require and CommonJS:
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169 | const go = require("gojs");
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170 |
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171 | const $ = go.GraphObject.make; // for conciseness in defining templates
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172 |
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173 | const myDiagram =
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174 | $(go.Diagram, '', // No DOM, so there can be no DIV!
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175 | {
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176 | viewSize: new go.Size(400,400), // Set this property in DOM-less environments
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177 | layout: $(go.LayeredDigraphLayout)
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178 | });
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179 |
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180 | myDiagram.nodeTemplate =
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181 | $(go.Node, 'Auto',
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182 | // specify the size of the node rather than measuring the size of the text
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183 | { width: 80, height: 40 },
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184 | // automatically save the Node.location to the node's data object
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185 | new go.Binding('location', 'loc', go.Point.parse).makeTwoWay(go.Point.stringify),
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186 | $(go.Shape, 'RoundedRectangle', { strokeWidth: 0},
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187 | new go.Binding('fill', 'color')),
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188 | $(go.TextBlock,
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189 | new go.Binding('text', 'key'))
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190 | );
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191 |
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192 | // After the layout, output results:
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193 | myDiagram.addDiagramListener('InitialLayoutCompleted', function() {
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194 | console.log(myDiagram.model.toJson());
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195 | });
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196 |
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197 | // load a model:
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198 | myDiagram.model = new go.GraphLinksModel(
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199 | [
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200 | { key: 'Alpha', color: 'lightblue' },
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201 | { key: 'Beta', color: 'orange' },
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202 | { key: 'Gamma', color: 'lightgreen' },
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203 | { key: 'Delta', color: 'pink' }
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204 | ],
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205 | [
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206 | { from: 'Alpha', to: 'Beta' },
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207 | { from: 'Alpha', to: 'Gamma' },
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208 | { from: 'Gamma', to: 'Delta' },
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209 | { from: 'Delta', to: 'Alpha' }
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210 | ]);
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211 | </code></pre>
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212 |
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213 | <p>
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214 | Alternatively, if your code is saved as <code>nodescript.mjs</code> or your project is of <code>"type": "module"</code>,
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215 | you can use GoJS as an ES6 module:
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216 | </p>
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217 | <pre class="lang-js"><code>
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218 | // nodescript.mjs
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219 | // This example loads the GoJS library, creates a Diagram with a layout and prints the JSON results.
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220 |
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221 | // Load GoJS. This assumes using import and ES6 modules:
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222 | import * as go from "gojs/release/go.mjs";
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223 |
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224 | const $ = go.GraphObject.make;
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225 | . . .
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226 | </code></pre>
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227 | </div>
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228 | </div>
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229 |
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230 | <div class="bg-nwoods-primary">
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231 | <section class="max-w-screen-lg text-white container mx-auto py-2 px-12">
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232 | <p id="version" class="leading-none mb-2 my-4">GoJS</p>
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233 | </section>
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234 | </div><footer class="bg-nwoods-primary text-white">
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235 | <div class="container max-w-screen-lg mx-auto px-8">
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236 | <div class="w-full py-6">
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237 |
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238 | <div class="max-w-screen-lg xl:max-w-screen-xl mx-auto px-4 sm:px-6 md:px-8">
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239 | <ul class="text-sm font-medium pb-14 sm:pb-20 grid grid-cols-1 sm:grid-cols-3 gap-y-10">
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240 | <li class="list-none row-span-2">
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241 | <h2 class="text-base font-semibold tracking-wide">GoJS</h2>
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242 | <ul class="list-none space-y-4 md:space-y-1 px-0">
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243 | <li>
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244 | <a href="../samples/index.html">Samples</a>
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245 | </li>
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246 | <li>
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247 | <a href="../learn/index.html">Learn</a>
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248 | </li>
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249 | <li>
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250 | <a href="../intro/index.html">Intro</a>
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251 | </li>
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252 | <li>
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253 | <a href="../api/index.html">API</a>
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254 | </li>
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255 | <li>
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256 | <a href="../changelog.html">Changelog</a>
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257 | </li>
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258 | <li>
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259 | <a href="https://github.com/NorthwoodsSoftware/GoJS">GitHub</a>
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260 | </li>
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261 | </ul>
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262 | </li>
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263 | <li class="list-none row-span-2">
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264 | <h2 class="text-base font-semibold tracking-wide">Support</h2>
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265 | <ul class="list-none space-y-4 md:space-y-1 px-0">
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266 | <li>
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267 | <a href="https://www.nwoods.com/contact.html"
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268 | target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/contact.html', 'contact');">Contact</a>
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269 | </li>
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270 | <li>
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271 | <a href="https://forum.nwoods.com/c/gojs">Forum</a>
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272 | </li>
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273 | <li>
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274 | <a href="https://www.nwoods.com/app/activate.aspx?sku=gojs">Activate</a>
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275 | </li>
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276 | <li>
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277 | <a href="https://www.nwoods.com/sales/index.html"
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278 | target="_blank" rel="noopener" onclick="getOutboundLink('https://www.nwoods.com/sales/index.html', 'buy');">Buy</a>
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279 | </li>
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280 | <li>
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281 | <a href="https://www.youtube.com/channel/UC9We8EoX596-6XFjJDtZIDg">Videos</a>
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282 | </li>
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283 | </ul>
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284 | </li>
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285 | <li class="list-none row-span-2">
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286 | <h2 class="text-base font-semibold tracking-wide">Company</h2>
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287 | <ul class="list-none space-y-4 md:space-y-1 px-0">
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288 | <li>
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289 | <a href="https://www.nwoods.com">Northwoods</a>
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290 | </li>
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291 | <li>
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292 | <a href="https://www.nwoods.com/about.html">About Us</a>
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293 | </li>
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294 | <li>
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295 | <a href="https://www.nwoods.com/contact.html">Contact Us</a>
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296 | </li>
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297 | <li>
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298 | <a href="https://twitter.com/northwoodsgo">Twitter</a>
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299 | </li>
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300 |
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301 | </ul>
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302 | </li>
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303 | </ul>
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304 |
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305 |
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306 | <p class="text-sm text-gray-100 md:mb-6">
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307 | Copyright 1998-2021 <a class="text-white" href="https://www.nwoods.com">Northwoods Software</a>
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308 | </p>
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309 | </div>
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310 | </div>
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311 | </footer> </body>
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312 |
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313 | <script async src="https://www.googletagmanager.com/gtag/js?id=UA-1506307-5"></script>
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314 | <script>
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315 | window.dataLayer = window.dataLayer || [];
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316 | function gtag(){dataLayer.push(arguments);}
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317 | gtag('js', new Date()); gtag('config', 'UA-1506307-5');
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318 | var getOutboundLink = function(url, label) {
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319 | gtag('event', 'click', {
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320 | 'event_category': 'outbound',
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321 | 'event_label': label,
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322 | 'transport_type': 'beacon'
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323 | });
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324 | }
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325 |
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326 |
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327 | var topButton = document.getElementById("topnavButton");
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328 | var topnavList = document.getElementById("topnavList");
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329 | topButton.addEventListener("click", function() {
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330 | this.classList.toggle("active");
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331 | topnavList.classList.toggle("hidden");
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332 | document.getElementById("topnavOpen").classList.toggle("hidden");
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333 | document.getElementById("topnavClosed").classList.toggle("hidden");
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334 | });
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335 | </script>
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336 | <script src="../assets/js/prism.js"></script>
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337 | <script src="../release/go.js"></script>
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338 | <script src="../assets/js/goDoc.js"></script>
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339 | <script>
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340 | document.addEventListener("DOMContentLoaded", function() {
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341 | if (window.go) document.getElementById('version').textContent = "GoJS version " + go.version;
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342 | if (window.goDoc) window.goDoc();
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343 | var d = window.diagrams;
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344 | for (var i = 0; i < d.length; i++) {
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345 | var dargs = d[i];
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346 | goCodeExecute(dargs[0], dargs[1], dargs[2], dargs[3], dargs[4]);
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347 | }
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348 | if (window.extra) window.extra();
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349 | });
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350 | </script>
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351 | </html>
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