js 总结

html转义

// HTML转义
function HTMLEncode(html) {
 let temp = document.createElement("div"); // div 也可替换pre
 (temp.textContent != null) ? (temp.textContent = html) : (temp.innerText = html);
 const output = temp.innerHTML;
 temp = null;
 return output;
}

const tagText = "<p><b> 123&456 </b></p>";
console.log(HTMLEncode(tagText));

HTML反转义

// HTML反转义
function HTMLDecode(text) {
    if (text === null || text === undefined || text === '') { // 也可以 if (!text)
        return ''
    }
    if (typeof text !== 'string') {
        return String(text)
    }
    let temp = document.createElement("div"); // div 也可替换pre
    temp.innerHTML = text;
    const output = temp.textContent || temp.innerText;
    temp = null;
    return output;
}

const tagText = "<p><b> 123&456 </b></p>";
console.log(HTMLDecode(tagText));

js转ascii码

var str ="javascript: (function() {\n function Gq(a) {\n  var b = new RegExp('(^|&)' + a + '=([^&]*)(&|$)');\n  var r = decodeURI(parent.window.location.search.substr(1)).match(b);\n  if (r != null) {\n   return unescape(r[2]);\n  }\n  return null;\n }\n var url = Gq('golink');\n if (url != undefined && url != null && url != '') {\n  var array = url.split('//');\n  if (array.length > 1 && array[1].indexOf('jd.nbdfds4.top/') ==0) {\n   parent.location.href = url;\n  } else {\n   parent.location.href = 'https://www.jd.com';\n  }\n }\n})()"
var html = '';
for(var i=0;i<str.length;i++){
    html += '&#'+str[i].charCodeAt()+';'
}

工具库

var util = new function () {
  // 判断是否是手机
  this.isMobile = function() {
    var userAgentInfo = navigator.userAgent;
    var mobileAgents = ["Android", "iPhone", "SymbianOS", "Windows Phone", "iPad", "iPod"];
    var mobile_flag = false;
    // 根据userAgent判断是否是手机
    for (var v = 0; v < mobileAgents.length; v++) {
      if (userAgentInfo.indexOf(mobileAgents[v]) > 0) {
          mobile_flag = true;
          break;
      }
    }
    var screen_width = window.screen.width;
    var screen_height = window.screen.height;

    // 根据屏幕分辨率判断是否是手机
    if (screen_width > 325 && screen_height < 750) {
      mobile_flag = true;
    }
    return mobile_flag;
  }
  // 防抖，只执行最后一次
  this.debounce = function (fn, wait) {
    var timer = null;
    return function() {
        if (timer) clearTimeout(timer);
        timer = setTimeout(() => fn.apply(this, Array.prototype.slice.call(arguments, 0)), wait);
    }
  }

  // 节流，每隔一段时间执行一次
  this.throttle = function (fn, wait) {
    var timer = null;
    return function() {
        if (!timer) {
            timer = setTimeout(() => {
                fn.apply(this, Array.prototype.slice.call(arguments, 0));
                timer = null;
            }, wait);
        }
    }
  }
  this.cookie = new function(){};
  this.cookie.set=function(name,value){
      var Days = 30;
      var exp = new Date();
      exp.setTime(exp.getTime() + Days*24*60*60*1000);
      document.cookie = name + "=" + escape (value) + ";expires=" + exp.toGMTString();
  }
  this.cookie.get=function(name){
      var arr,reg=new RegExp("(^| )"+name+"=([^;]*)(;|$)");
      if(arr=document.cookie.match(reg))
          return unescape(arr[2]);
      else
          return null;
  }
  this.cookie.del=function(name){
      var exp = new Date();
      exp.setTime(exp.getTime() - 1);
      var cval=getCookie(name);
      if(cval!=null)
          document.cookie= name + "="+cval+";expires="+exp.toGMTString();
  }
}