```js // eslint-disable-next-line no-global-assign if (typeof global === 'undefined') { global = window; } if (!global.JSONUtils) global.JSONUtils = {}; var _jsonUtils = { extractJSON: function(rawJson) { return rawJson .replace(/\s*while\((1|true)\)\s*;?/, '') .replace(/\s*for\(;;\)\s*;?/, '') .replace(/^[^{\[].+\(\s*?{/, '{') .replace(/}\s*?\);?\s*$/, '}'); }, removeQuote: function(json) { return json .replace(/\s+/g, '') .replace(/<\/?.+?>/g, '') .replace(/[\r\n]/g, ''); }, isJSON: function(jsonStr) { var str = jsonStr; if (!str || str.length === 0) { return false; } str = str.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@'); str = str.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']'); str = str.replace(/(?:^|:|,)(?:\s*\[)+/g, ''); return /^[\],:{}\s]*$/.test(str); }, isJSONP: function(jsonStr) { return this.isJSON(this.extractJSON(jsonStr)); }, allTextNodes(nodes) { return !Object.keys(nodes).some(function(key) { return nodes[key].nodeName !== '#text'; }); }, getPreWithSource() { if (!document || !document.body) return null; var childNodes = document.body.childNodes; if (childNodes.length === 0) { return null; } // 如果节点大于1 && 都是文本节点 if (childNodes.length > 1 && this.allTextNodes(childNodes)) { // 合并相邻的文本节点并删除空的文本节点 document.body.normalize(); } var childNode = childNodes[0]; var nodeName = childNode.nodeName; var textContent = childNode.textContent; // 如果是Pre直接返回节点 if (nodeName === 'PRE') { return childNode; } // if Content-Type is text/html if (nodeName === '#text' && textContent.trim().length > 0) { var pre = document.createElement('pre'); pre.textContent = textContent; return pre; } return null; }, checkIfJson(element) { var pre = element || this.getPreWithSource(); if (pre !== null && pre !== undefined && (this.isJSON(pre.textContent) || this.isJSONP(pre.textContent))) { return true; } return false; }, }; Object.assign(global.JSONUtils, _jsonUtils); ```