jQuery：附加事件、调用事件

发布于 2024-09-24 06:24:00 字数 341 浏览 3 评论 0原文

在一段代码中，我有这样的：

$("#searchbar").trigger("onOptionsApplied");

在另一段代码中，我有这样的：

$("#searchbar").bind("onOptionsApplied", function () {
    alert("fdafds");
});

bind() 在 trigger() 之前执行，但是当我查看页面，我从未收到 alert()。

为什么不呢？我对事件做错了什么？

原文

In one section of code I have this:

$("#searchbar").trigger("onOptionsApplied");

In another section of code, I have this:

$("#searchbar").bind("onOptionsApplied", function () {
    alert("fdafds");
});

The bind() is executed before the trigger(), but when I view the page, I never get an alert().

Why not? What am I doing wrong with events?

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腹黑女流氓 2024-10-01 06:24:01

也许当你执行时你的#searchbar不是DOM的一部分：

  // This will not work if #searchbar is not part of the DOM
  //   or if the DOM is not ready yet.
$("#searchbar").bind("onOptionsApplied", function () {
    alert("fdafds");
});

如果.bind() 位于文档之外，或者因为 #searchbar 是动态添加的。

为了确保即使在这些条件下 onOptionsApplied 也能正确绑定，请使用 .live() 或 。 delegate()：

// This can be outside document ready.
//   It binds all now and future #searchbars
$("#searchbar").live("onOptionsApplied", function () {
    alert("fdafds");
});

// Document ready
$(function() {
    // Whatever you do....

    // Make sure #searchbar is now part of the DOM

      // Trigger onOptionsApplied
    $("#searchbar").trigger("onOptionsApplied");
    });
});

jsFiddle 示例

Perhaps your #searchbar is not part of the DOM when you execute:

  // This will not work if #searchbar is not part of the DOM
  //   or if the DOM is not ready yet.
$("#searchbar").bind("onOptionsApplied", function () {
    alert("fdafds");
});

This type of stuff often happens if .bind() is outside the document ready or because #searchbar is added dynamically.

To make sure onOptionsApplied is bound correctly even under these conditions, use .live() or .delegate():

// This can be outside document ready.
//   It binds all now and future #searchbars
$("#searchbar").live("onOptionsApplied", function () {
    alert("fdafds");
});

// Document ready
$(function() {
    // Whatever you do....

    // Make sure #searchbar is now part of the DOM

      // Trigger onOptionsApplied
    $("#searchbar").trigger("onOptionsApplied");
    });
});