@nuxtjs/devalue/dist/devalue.esm.js

var consola = require('consola');
var chars = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ_$';
var unsafeChars = /[<>\b\f\n\r\t\0\u2028\u2029]/g;
var reserved = /^(?:do|if|in|for|int|let|new|try|var|byte|case|char|else|enum|goto|long|this|void|with|await|break|catch|class|const|final|float|short|super|throw|while|yield|delete|double|export|import|native|return|switch|throws|typeof|boolean|default|extends|finally|package|private|abstract|continue|debugger|function|volatile|interface|protected|transient|implements|instanceof|synchronized)$/;
var escaped = {
    '<': '\\u003C',
    '>': '\\u003E',
    '/': '\\u002F',
    '\\': '\\\\',
    '\b': '\\b',
    '\f': '\\f',
    '\n': '\\n',
    '\r': '\\r',
    '\t': '\\t',
    '\0': '\\0',
    '\u2028': '\\u2028',
    '\u2029': '\\u2029'
};
var objectProtoOwnPropertyNames = Object.getOwnPropertyNames(Object.prototype).sort().join('\0');
// workaround to disable warnings, see https://github.com/nuxt/nuxt.js/issues/4026 for details
var defaultLogLevel = process.env.NUXT_ENV_DEVALUE_LOG_LEVEL || 'warn';
var logLimit = parseInt(process.env.NUXT_ENV_DEVALUE_LOG_LIMIT) || 99;
function devalue(value, level) {
    if (level === void 0) { level = defaultLogLevel; }
    var counts = new Map();
    var logNum = 0;
    function log(message) {
        if (logNum < logLimit) {
            consola[level](message);
            logNum += 1;
        }
    }
    function walk(thing) {
        if (typeof thing === 'function') {
            consola[level]("Cannot stringify a function " + thing.name);
            return;
        }
        if (counts.has(thing)) {
            counts.set(thing, counts.get(thing) + 1);
            return;
        }
        counts.set(thing, 1);
        if (!isPrimitive(thing)) {
            var type = getType(thing);
            switch (type) {
                case 'Number':
                case 'String':
                case 'Boolean':
                case 'Date':
                case 'RegExp':
                    return;
                case 'Array':
                    thing.forEach(walk);
                    break;
                case 'Set':
                case 'Map':
                    Array.from(thing).forEach(walk);
                    break;
                default:
                    var proto = Object.getPrototypeOf(thing);
                    if (proto !== Object.prototype &&
                        proto !== null &&
                        Object.getOwnPropertyNames(proto).sort().join('\0') !== objectProtoOwnPropertyNames) {
                        if (typeof thing.toJSON !== "function") {
                            log("Cannot stringify arbitrary non-POJOs " + thing.constructor.name);
                        }
                    }
                    else if (Object.getOwnPropertySymbols(thing).length > 0) {
                        log("Cannot stringify POJOs with symbolic keys " + Object.getOwnPropertySymbols(thing).map(function (symbol) { return symbol.toString(); }));
                    }
                    else {
                        Object.keys(thing).forEach(function (key) { return walk(thing[key]); });
                    }
            }
        }
    }
    walk(value);
    var names = new Map();
    Array.from(counts)
        .filter(function (entry) { return entry[1] > 1; })
        .sort(function (a, b) { return b[1] - a[1]; })
        .forEach(function (entry, i) {
        names.set(entry[0], getName(i));
    });
    function stringify(thing) {
        if (names.has(thing)) {
            return names.get(thing);
        }
        if (isPrimitive(thing)) {
            return stringifyPrimitive(thing);
        }
        var type = getType(thing);
        switch (type) {
            case 'Number':
            case 'String':
            case 'Boolean':
                return "Object(" + stringify(thing.valueOf()) + ")";
            case 'RegExp':
                return thing.toString();
            case 'Date':
                return "new Date(" + thing.getTime() + ")";
            case 'Array':
                var members = thing.map(function (v, i) { return i in thing ? stringify(v) : ''; });
                var tail = thing.length === 0 || (thing.length - 1 in thing) ? '' : ',';
                return "[" + members.join(',') + tail + "]";
            case 'Set':
            case 'Map':
                return "new " + type + "([" + Array.from(thing).map(stringify).join(',') + "])";
            default:
                if (thing.toJSON) {
                    var json = thing.toJSON();
                    if (getType(json) === 'String') {
                        // Try to parse the returned data
                        try {
                            json = JSON.parse(json);
                        }
                        catch (e) { }
                    }
                    return stringify(json);
                }
                if (Object.getPrototypeOf(thing) === null) {
                    if (Object.keys(thing).length === 0) {
                        return 'Object.create(null)';
                    }
                    return "Object.create(null,{" + Object.keys(thing).map(function (key) { return safeKey(key) + ":{writable:true,enumerable:true,value:" + stringify(thing[key]) + "}"; }).join(',') + "})";
                }
                return "{" + Object.keys(thing).map(function (key) { return safeKey(key) + ":" + stringify(thing[key]); }).join(',') + "}";
        }
    }
    var str = stringify(value);
    if (names.size) {
        var params_1 = [];
        var statements_1 = [];
        var values_1 = [];
        names.forEach(function (name, thing) {
            params_1.push(name);
            if (isPrimitive(thing)) {
                values_1.push(stringifyPrimitive(thing));
                return;
            }
            var type = getType(thing);
            switch (type) {
                case 'Number':
                case 'String':
                case 'Boolean':
                    values_1.push("Object(" + stringify(thing.valueOf()) + ")");
                    break;
                case 'RegExp':
                    values_1.push(thing.toString());
                    break;
                case 'Date':
                    values_1.push("new Date(" + thing.getTime() + ")");
                    break;
                case 'Array':
                    values_1.push("Array(" + thing.length + ")");
                    thing.forEach(function (v, i) {
                        statements_1.push(name + "[" + i + "]=" + stringify(v));
                    });
                    break;
                case 'Set':
                    values_1.push("new Set");
                    statements_1.push(name + "." + Array.from(thing).map(function (v) { return "add(" + stringify(v) + ")"; }).join('.'));
                    break;
                case 'Map':
                    values_1.push("new Map");
                    statements_1.push(name + "." + Array.from(thing).map(function (_a) {
                        var k = _a[0], v = _a[1];
                        return "set(" + stringify(k) + ", " + stringify(v) + ")";
                    }).join('.'));
                    break;
                default:
                    values_1.push(Object.getPrototypeOf(thing) === null ? 'Object.create(null)' : '{}');
                    Object.keys(thing).forEach(function (key) {
                        statements_1.push("" + name + safeProp(key) + "=" + stringify(thing[key]));
                    });
            }
        });
        statements_1.push("return " + str);
        return "(function(" + params_1.join(',') + "){" + statements_1.join(';') + "}(" + values_1.join(',') + "))";
    }
    else {
        return str;
    }
}
function getName(num) {
    var name = '';
    do {
        name = chars[num % chars.length] + name;
        num = ~~(num / chars.length) - 1;
    } while (num >= 0);
    return reserved.test(name) ? name + "_" : name;
}
function isPrimitive(thing) {
    return Object(thing) !== thing;
}
function stringifyPrimitive(thing) {
    if (typeof thing === 'string')
        return stringifyString(thing);
    if (thing === void 0)
        return 'void 0';
    if (thing === 0 && 1 / thing < 0)
        return '-0';
    var str = String(thing);
    if (typeof thing === 'number')
        return str.replace(/^(-)?0\./, '$1.');
    return str;
}
function getType(thing) {
    return Object.prototype.toString.call(thing).slice(8, -1);
}
function escapeUnsafeChar(c) {
    return escaped[c] || c;
}
function escapeUnsafeChars(str) {
    return str.replace(unsafeChars, escapeUnsafeChar);
}
function safeKey(key) {
    return /^[_$a-zA-Z][_$a-zA-Z0-9]*$/.test(key) ? key : escapeUnsafeChars(JSON.stringify((key)));
}
function safeProp(key) {
    return /^[_$a-zA-Z][_$a-zA-Z0-9]*$/.test(key) ? "." + key : "[" + escapeUnsafeChars(JSON.stringify(key)) + "]";
}
function stringifyString(str) {
    var result = '"';
    for (var i = 0; i < str.length; i += 1) {
        var char = str.charAt(i);
        var code = char.charCodeAt(0);
        if (char === '"') {
            result += '\\"';
        }
        else if (char in escaped) {
            result += escaped[char];
        }
        else if (code >= 0xd800 && code <= 0xdfff) {
            var next = str.charCodeAt(i + 1);
            // If this is the beginning of a [high, low] surrogate pair,
            // add the next two characters, otherwise escape
            if (code <= 0xdbff && (next >= 0xdc00 && next <= 0xdfff)) {
                result += char + str[++i];
            }
            else {
                result += "\\u" + code.toString(16).toUpperCase();
            }
        }
        else {
            result += char;
        }
    }
    result += '"';
    return result;
}

export default devalue;