charset.js

100% Statements 20/20
100% Branches 18/18
100% Functions 2/2
100% Lines 20/20

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  /**
 * @file rule: charset
 * @author nighca<nighca@live.cn>
 */
 
module.exports = {
 
    name: 'charset',
 
    desc: '<meta charset> recommended.',
 
    lint: function (getCfg, document, reporter) {
        var head = document.querySelector('head');
        if (!head || !getCfg(head)) {
            return;
        }
 
        var charsetMeta = head.querySelector('meta[charset]');
        if (!charsetMeta) {
            reporter.warn(head.startIndex, '006', '<meta charset> recommended.');
        }
        else if (charsetMeta !== head.firstElementChild) {
            reporter.warn(charsetMeta.startIndex, '007', '<meta> charset should be the first element child of <head>.');
        }
    },
 
    format: function (getCfg, document, options) {
        var head = document.querySelector('head');
        if (!head || !getCfg(head)) {
            return;
        }
 
        var charsetMeta = document.querySelector('meta[charset]');
 
        if (!charsetMeta) {
            charsetMeta = document.createElement('meta');
            charsetMeta.setAttribute('charset', 'utf-8');
        }
 
        if (charsetMeta !== head.firstElementChild) {
            if (head.firstElementChild) {
                head.insertBefore(charsetMeta, head.firstChild);
            }
            else {
                head.appendChild(charsetMeta);
            }
        }
    }
 
};