为什么数组在$localStorage工作

Why is an array in $localStorage working

本文关键字：localStorage 工作 数组 为什么      更新时间：2023-09-26

index.html 

<div class="modal-body">
   <form >
      <tags options="{addable: true}" typeahead-options="typeaheadOpts" data-model="information.address" data-src="toPerson as toPerson for toPerson in to"></tags>
      <input type="text" placeholder="Subject" style="width:95%;" data-ng-model = "information.subject"><br />
      <textarea style="width:95%;" rows="10" data-ng-model = "information.emailContent"></textarea>
   </form>
</div>
<div class="modal-footer">
   <a href="#" class="btn" ng-click = "submit(information.address, information.subject, information.emailContent); close()">Close</a>
   <a href="#" class="btn btn-primary" ng-click = "close()">Send</a>
</div>

emailViewController.js 

$scope.information = {
      address: [],
      subject: []
   };
$scope.submit = function (address, subject, emailContent) {
   $localStorage.address.push(address);
   if (! ($localStorage.subject instanceof Array) ) {
      $localStorage.subject = [];
   }
   $localStorage.subject.push(subject);

如果我不将$localStorage.subject初始化为数组，它会给我一个错误，说.push is not a function。

当我将数据推送到$localStorage.address时，为什么不给出此错误?

您使用:

var Helper = {
    pushArray: function (arr1, arr2) {
        arr1 = this.toArray(arr1);
        if (arr1 && arr2 && Array.isArray(arr1)) {
            arr1.push.apply(arr1, Array.isArray(arr2) ? arr2 : [arr2]);
        }
    },
    toArray: function (arr) {
        return arr ? (Array.isArray(arr) ? arr : [arr]) : [];
    }
};
Helper.pushArray(arr1, second);

或者直接声明:

$localStorage.$default({
   subject: []
});
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