38 lines
1.4 KiB
JavaScript
38 lines
1.4 KiB
JavaScript
var whiteListTag = ['style', '!--', 'kbd'];
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var whiteListAttr = ['id', 'class', 'style'];
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var filterXSSOptions = {
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allowCommentTag: true,
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escapeHtml: function (html) {
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// to allow html comment in multiple lines
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return html.replace(/<(.*?)>/g, '<$1>');
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},
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onIgnoreTag: function (tag, html, options) {
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// allow style in html
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if (whiteListTag.indexOf(tag) !== -1) {
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// do not filter its attributes
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return html;
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}
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},
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onTagAttr: function (tag, name, value, isWhiteAttr) {
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// allow href starts with '.' or '/'
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if (isWhiteAttr && name === 'href' && (value.indexOf('.') == 0 || value.indexOf('/') == 0)) {
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return name + '="' + filterXSS.escapeAttrValue(value) + '"';
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}
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},
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onIgnoreTagAttr: function (tag, name, value, isWhiteAttr) {
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// allow attr start with 'data-' or in the whiteListAttr
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if (name.substr(0, 5) === 'data-' || whiteListAttr.indexOf(name) !== -1) {
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// escape its value using built-in escapeAttrValue function
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return name + '="' + filterXSS.escapeAttrValue(value) + '"';
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}
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// allow ol specify start number
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if (tag === 'ol' && name === 'start') {
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return name + '="' + filterXSS.escapeAttrValue(value) + '"';
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}
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}
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};
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function preventXSS(html) {
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return filterXSS(html, filterXSSOptions);
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} |