1.隐式建立 html 标签

<input type="hidden" name="tc_id" value="{{tc_id}}">

这类要领平常合营 ajax，上面的 value 运用了模板引擎

2.window[‘data’]

window["name"] = "the window object";

3.运用 localStorage，cookie 等存储

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

特征：cookie，localStorage，sessionStorage，indexDB

从上表能够看到，cookie 已不发起用于存储。假如没有大批数据存储需求的话，能够运用 localStorage 和 sessionStorage 。关于不怎么转变的数据只管运用 localStorage 存储，不然能够用 sessionStorage 存储。

注重点:存储
object范例数据，此深拷贝要领会疏忽掉函数和
undefined

var obj = {
  type: undefined,
  text: "xiaoyueyue",
  methord: function() {
    alert("I am an methord");
  }
};

localStorage.setItem("data", JSON.stringify(obj));
console.log(JSON.parse(localStorage.getItem("data"))); // {text: "xiaoyueyue"}

4.猎取地点栏要领

1. 本身封装的要领

function parseParam(url) {
  var paramArr = decodeURI(url)
      .split("?")[1]
      .split("&"),
    obj = {};
  for (var i = 0; i < paramArr.length; i++) {
    var item = paramArr[i];
    if (item.indexOf("=") != -1) {
      var tmp = item.split("=");
      obj[tmp[0]] = tmp[1];
    } else {
      obj[item] = true;
    }
  }
  return obj;
}

2.正则表达式要领

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.标签绑定函数传参

<!--base-->
<button id="test1" onclick="alert(id)">test1</button>

<!--高等-->
<button
  id="test"
  name="123"
  yue="xiaoyueyue"
  friend="heizi"
  onclick="console.log(this.getAttribute('yue'),this.getAttribute('friend'))"
>
  test
</button>

this 拓展

运用 this 传参，在运用 art-template 中揣摩出来的，再也不必只通报一个 id 拼接成好几个参数了！happy！

var box = document.createElement("div");
box.innerHTML =
  "<button id='1' data-name='xiaoyueyue' data-age='25' data-friend='heizi' onclick='alertInfo(this.dataset)'>点击</button>";
document.body.appendChild(box);

// name,age,friend
function alertInfo(data) {
  alert(
    "大家好,我是" +
      data.name +
      ", 我本年" +
      data.age +
      "岁了，我的好朋友是" +
      data.friend +
      " !"
  );
}

这里须要注重一点：存储的 data—含有大写的单词 =》这里会一致转化为小写，比方：data-orderId = “2a34fb64a13211e8a0f00050568b2fdd”，在现实取值的时刻为
this.dataset.orderid;

event

既然能够运用 this，那末在事宜当中event.target要领也是能够的：

依据 class 猎取当前的索引值，参数能够为 event 对象

  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 < domArr.length; index++) {
      if (domArr[index] === element) {
        return index;
      }
    }
    return -1;
  },

6.HTML5 data-* 自定义属性

<button data-name="xiaoyueyue">点击</button>

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

7.字符串传参

单个参数

var name = "xiaoyueyue",
  age = 25;

var box = document.createElement("div");
box.innerHTML = "<button onclick=\"alertInfo('" + name + "')\">点击</button>";
document.body.appendChild(box);

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

多参通报

  var name = 'xiaoyueyue',
      age = '25',
      home = 'shanxi',
      friend = 'heizi',
      DQ = """; // 双引号的超文本标记言语

    var params = """ + name + "","" + age + "","" + home + "","" + friend + """;
    var params2 = DQ + name + DQ + ',' + DQ + age + DQ + ',' + DQ + home + DQ + ',' + DQ + friend + DQ;
    var box = document.createElement("div");
    box.innerHTML = "<button onclick='alertInfo(" + params + ")'>点击</button>";
    console.log(box)
    document.body.appendChild(box);


    // name, age,home,friend
    function alertInfo(name, age, home, friend) {
      alert("我是" + name + ',' + "我本年" + age + "岁了！")

庞杂传参

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

var box = document.createElement("div"),
  html = "";

for (var i = 0; i < data.length; i++) {
  html +=
    "<button id='btn'  onclick='alertInfo(id,\"" +
    data[i].name +
    '","' +
    data[i].age +
    '","' +
    data[i].home +
    '","' +
    data[i].friend +
    "\")'>点击</button>";
}
box.innerHTML = html;
document.body.appendChild(box);

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

8.arguments

arguments对象是一切（非箭头）函数中都可用的局部变量。你能够运用 arguments 对象在函数中援用函数的参数。它是一个类数组的对象。

<button
  onclick="fenpei('f233c7a290ae11e8a0f00050568b2fdd','100','0号 车用柴油(Ⅴ)')"
>
  分派
</button>

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

9.form 表单

借助form表单，ajax 通报序列化参数

// form表单序列化，摘自JS高程
function serialize(form) {
  var parts = [],
    field = null,
    i,
    len,
    j,
    optLen,
    option,
    optValue;

  for (i = 0, len = form.elements.length; i < len; i++) {
    field = form.elements[i];

    switch (field.type) {
      case "select-one":
      case "select-multiple":
        if (field.name.length) {
          for (j = 0, optLen = field.options.length; j < optLen; j++) {
            option = field.options[j];
            if (option.selected) {
              optValue = "";
              if (option.hasAttribute) {
                optValue = option.hasAttribute("value")
                  ? option.value
                  : option.text;
              } else {
                optValue = option.attributes["value"].specified
                  ? option.value
                  : option.text;
              }
              parts.push(
                encodeURIComponent(field.name) +
                  "=" +
                  encodeURIComponent(optValue)
              );
            }
          }
        }
        break;

      case undefined: //fieldset
      case "file": //file input
      case "submit": //submit button
      case "reset": //reset button
      case "button": //custom button
        break;

      case "radio": //radio button
      case "checkbox": //checkbox
        if (!field.checked) {
          break;
        }
      /* falls through */

      default:
        //don't include form fields without names
        if (field.name.length) {
          parts.push(
            encodeURIComponent(field.name) +
              "=" +
              encodeURIComponent(field.value)
          );
        }
    }
  }
  return parts.join("&");
}

栗子：

<form id="formData">
  <div class="pop-info">
    <label for="ordersaleCode">定单编号：</label>
    <input
      type="text"
      id="ordersaleCode"
      name="ordersaleCode"
      placeholder="请输入定单编号"
    />
  </div>
  <div class="pop-info">
    <label for="extractType">配送体式格局：</label>
    <select id="extractType" name="extractType" class="mySelect">
      <option value="0" selected>配送</option>
      <option value="1">自提</option>
    </select>
  </div>
</form>
<button>猎取参数</button>

document.querySelector("button").onclick = function() {
  console.log("param: " + serialize(document.getElementById("formData"))); // param: ordersaleCode=&extractType=0
};

10. 宣布定阅处置惩罚庞杂逻辑传参

支撑先定阅后宣布，以及先宣布后定阅

• 要领源码

var Event = (function() {
  var clientList = {},
    pub,
    sub,
    remove;

  var cached = {};

  sub = function(key, fn) {
    if (!clientList[key]) {
      clientList[key] = [];
    }
    // 运用缓存实行的定阅不必屡次挪用实行
    cached[key + "time"] == undefined ? clientList[key].push(fn) : "";
    if (cached[key] instanceof Array && cached[key].length > 0) {
      //申明有缓存的 能够实行
      fn.apply(null, cached[key]);
      cached[key + "time"] = 1;
    }
  };
  pub = function() {
    var key = Array.prototype.shift.call(arguments),
      fns = clientList[key];
    if (!fns || fns.length === 0) {
      //初始默许缓存
      cached[key] = Array.prototype.slice.call(arguments, 0);
      return false;
    }

    for (var i = 0, fn; (fn = fns[i++]); ) {
      // 再次宣布更新缓存中的 data 参数
      cached[key + "time"] != undefined
        ? (cached[key] = Array.prototype.slice.call(arguments, 0))
        : "";
      fn.apply(this, arguments);
    }
  };
  remove = function(key, fn) {
    var fns = clientList[key];
    // 缓存定阅一并删除
    var cachedFn = cached[key];
    if (!fns && !cachedFn) {
      return false;
    }
    if (!fn) {
      fns && (fns.length = 0);
      cachedFn && (cachedFn.length = 0);
    } else {
      if (cachedFn) {
        for (var m = cachedFn.length - 1; m >= 0; m--) {
          var _fn_temp = cachedFn[m];
          if (_fn_temp === fn) {
            cachedFn.splice(m, 1);
          }
        }
      }
      for (var n = fns.length - 1; n >= 0; n--) {
        var _fn = fns[n];
        if (_fn === fn) {
          fns.splice(n, 1);
        }
      }
    }
  };
  return {
    pub: pub,
    sub: sub,
    remove: remove
  };
})();

在微信小顺序中运用的例子:

• 全局挂载运用

// app.js
App({
  onLaunch: function(e) {
    // 注册 storage，这是第二条
    wx.Storage = Storage;
    // 注册宣布定阅形式
    wx.yue = Event;
  }
});

• 运用实例

// 增加收货地点页面定阅
 onLoad: function (options) {
        wx.yue.sub("addAddress", function (data) {
            y.setData({
                addAddress: data
            })
        })
 }
/**
 * 性命周期函数--监听页面隐蔽
 */
 onHide: function () {
    // 作废过剩的事宜定阅
    wx.Storage.removeItem("addAddress");
},
 onUnload: function () {
    // 作废过剩的事宜定阅
    wx.yue.remove("addAddress");
}

// 通报地点页面猎取好数据通报
wx.yue.pub("addAddress", data.info);
// 补充跳转返回

注重:运用完成数据后要注重卸载，在页面被封闭时操纵

拓展浏览

• JavaScript 参数通报的深切明白