如何从闭包中调用 javascript class 函数
How to call javascript class function from closure
我正在开发一个没有选择器的 jQuery 插件。初始化它时,我实例化了一个具有功能的对象。在这些函数中,我需要使用闭包。在这些闭包中,我想调用我的初始对象函数。
为了更清楚,这里是代码的简化版本。
HTML
<script src="/path/to/jquery/2.1.1/jquery.min.js"></script>
<script src="/path/to/my/script/myeditor.js"></script>
<div class="editable">Div1</div>
<div class="editable">Div2</div>
<script>
$.myeditor({
option1: 'a',
option2: 'b'
});
</script>
myeditor.js
function ($) {
var MyEditor = function (options)
{
this.$options = $.extend(true, {}, $.myeditor.defaults, options);
this.init();
};
$.myeditor = function (options = {})
{
return new MyEditor(options);
};
$.flyeditor.defaults = {
option1: '1',
option2: '2'
};
MyEditor.prototype.notify = function(message = '')
{
console.log(message);
};
MyEditor.prototype.init = function()
{
// Do stuff
$('.editables').each(function() {
$this = $(this);
// Here comes the error
notify($this.html());
});
};
}(jQuery);
问题是 notify(this.html());
引发错误 ReferenceError: notify is not defined
如何到达这个通知方法?
您可以将 this
分配给闭包中的单独局部变量。您需要这样做,因为 this
将不再指向 each
中的 MyEditor
对象,它将指向每个 .editables
此外,您可能打算调用 this.notify()
,因为该函数附加到 MyEditor
的原型
MyEditor.prototype.init = function()
{
// Do stuff
var that = this; // <-- now we can reach this inside function.
$('.editables').each(function() {
$this = $(this);
// Here comes the error
// You can't use notify, that function is not defined
// You can't use this.notify because this points to something else (the node)
// inside the function in each
that.notify($this.html());
});
};
MyEditor.prototype.init = function()
{
// Do stuff
var self = this;
$('.editables').each(function() {
$this = $(this);
// Here comes the error
self.notify($this.html());
});
};
我正在开发一个没有选择器的 jQuery 插件。初始化它时,我实例化了一个具有功能的对象。在这些函数中,我需要使用闭包。在这些闭包中,我想调用我的初始对象函数。
为了更清楚,这里是代码的简化版本。
HTML
<script src="/path/to/jquery/2.1.1/jquery.min.js"></script>
<script src="/path/to/my/script/myeditor.js"></script>
<div class="editable">Div1</div>
<div class="editable">Div2</div>
<script>
$.myeditor({
option1: 'a',
option2: 'b'
});
</script>
myeditor.js
function ($) {
var MyEditor = function (options)
{
this.$options = $.extend(true, {}, $.myeditor.defaults, options);
this.init();
};
$.myeditor = function (options = {})
{
return new MyEditor(options);
};
$.flyeditor.defaults = {
option1: '1',
option2: '2'
};
MyEditor.prototype.notify = function(message = '')
{
console.log(message);
};
MyEditor.prototype.init = function()
{
// Do stuff
$('.editables').each(function() {
$this = $(this);
// Here comes the error
notify($this.html());
});
};
}(jQuery);
问题是 notify(this.html());
引发错误 ReferenceError: notify is not defined
如何到达这个通知方法?
您可以将 this
分配给闭包中的单独局部变量。您需要这样做,因为 this
将不再指向 each
中的 MyEditor
对象,它将指向每个 .editables
此外,您可能打算调用 this.notify()
,因为该函数附加到 MyEditor
MyEditor.prototype.init = function()
{
// Do stuff
var that = this; // <-- now we can reach this inside function.
$('.editables').each(function() {
$this = $(this);
// Here comes the error
// You can't use notify, that function is not defined
// You can't use this.notify because this points to something else (the node)
// inside the function in each
that.notify($this.html());
});
};
MyEditor.prototype.init = function()
{
// Do stuff
var self = this;
$('.editables').each(function() {
$this = $(this);
// Here comes the error
self.notify($this.html());
});
};