Summary of methods for passing parameters in js (with code)

This article brings you a summary of the methods of passing parameters in js (with code). It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

1. Implicitly create html tags

<input>

This method is generally used with ajax. The above value uses the template engine

2.window['data']

window['name'] = "the window object";

3. Use localStorage, cookies, etc. to store

window.localStorage.setItem("name", "xiaoyueyue");
window.localStorage.getItem("name")

Features

1、localStorage 是持久存储，不主动删除 一直存在  
         sessionStorage 是临时存储,关闭浏览器数据就没了
2、localStorage 可以多窗口共享
       sessionStorage 不能多窗口共享数据

4. Get the address bar method

1. My own encapsulated method

function parseParam(url) {
  var paramArr = decodeURI(url).split("?")[1].split("&"),
    obj = {};
  for (var i = 0; i <p>2. Regular expression method</p><pre class="brush:php;toolbar:false">function GetQueryString(name) {
var reg = new RegExp("(^|&)" + name + "=([^&]*)(&|$)");
var r = window.location.search.substr(1).match(reg);
if (r != null) return unescape(r[2]); return null;
}

5. Label binding function parameter passing

<!--base-->
 <button>test1</button>
 
<!--高级-->
<button>test</button>

this extension

Use This parameter passing was figured out while using art-template. It is no longer necessary to pass only one ID and splice it into several parameters! happy!

var box = document.createElement("p");
box.innerHTML = "<button>点击</button>";
document.body.appendChild(box);


// name,age,friend
function alertInfo(val) {
  console.log(val);
  alert('大家好,我是' + val.dataset.name + ', 我今年' + val.dataset.age + '岁了，我的好朋友是' + val.dataset.friend + ' !')

}

event

Since this can be used, the event.target method is also available in the event:

Get the current index value according to class , the parameters can be event objects

  var getIndexByClass =  function (param) {
    var element = param.classname ? param : param.target;
    var className = element.classname;
    var domArr = Array.prototype.slice.call(document.querySelectorAll('.' + className));
    for (var index = 0; index <h2 id="HTML-data-Custom-attributes">6.HTML5 data-* Custom attributes</h2><pre class="brush:php;toolbar:false"><button>点击</button>

 var btn = document.querySelector("button")
    btn.onclick = function () {
      alert(this.dataset.name)
    }

7. String parameters

Single parameter

var name = 'xiaoyueyue',
  age = 25;

var box = document.createElement("p");
box.innerHTML = '<button>点击</button>';
console.log(box)
document.body.appendChild(box);


// name, age
function alertInfo(name, age, home, friend) {
  alert("我是" + name)
}

Multi-parameter passing

 var name = 'xiaoyueyue',
  age = '25',
  home = 'shanxi',
  friend = 'heizi';

var params = """ + name + "","" + age + "","" + home + "","" + friend + """;
var box = document.createElement("p");
box.innerHTML = "<button>点击</button>";
console.log(box)
document.body.appendChild(box);


// name, age,home,friend
function alertInfo(name, age, home, friend) {
  alert("我是" + name + ',' + "我今年" + age + "岁了！")
}

Complex parameter passing

var data = [
  {
    "name": "xiaoyueyue",
    "age": "25",
    "home": "shanxi",
    "friend": "heizi"
  }

]

var box = document.createElement("p");

for (var i = 0; i 点击";
}

document.body.appendChild(box);

function alertInfo(id, name, age, home, friend) {
  alert("我是" + name + "," + friend + "是我的好朋友")
}

8.arguments

argumentsObjects are local variables available in all (non-arrow) functions . You can use the arguments object to reference a function's arguments within a function. It is an array-like object.

<button>分配</button>

function fenpei() {
    var args = Array.prototype.slice.call(arguments);
    alert("我是" + args[2] + "油品，数量为 " + args[1] + " 吨， id为 " + args[0])

}

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js anonymous function parameter passing method

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