无法在函数内部获取全局变量（javascript） [英] Can't get global variables inside the function (javascript)

问题描述

var selection = document.getElementById('selection');
var closed = true;

function openorclosebar() {

    if(closed == false){
        selection.style.webkitAnimation='bounceOutDown 1s forwards';
        selection.style.animation='bounceOutDown 1s forwards';
        closed = false;
    }
    else{
        selection.style.webkitAnimation='bounceInUp 1s forwards';
        selection.style.animation='bounceInUp 1s forwards';
        closed = true;
    };
}

如何使用全局变量选择和关闭来使用它们。我试过window.selection和window.closed，但没有任何帮助。如果您有任何想法，请帮助我，这是非常重要的项目。

How can I get global variables "selection" and "closed" to use them. I tried "window.selection" and "window.closed", but nothing helps. If you have an idea, help me please, it's so important project.

推荐答案

全球已关闭变量 only：这是窗口 s .closed 属性 - 例如之前发生了 .name ： - ）

The global closed variable is read-only: It's the windows .closed property - such has happened before with .name :-)

使用IEFE使您的变量成为本地：

Use an IEFE to make your variable local:

(function() {
    var selection = document.getElementById('selection');
    var closed = true;

    function openorclosebar() {
        if(!closed) {
            selection.style.webkitAnimation='bounceOutDown 1s forwards';
            selection.style.animation='bounceOutDown 1s forwards';
            closed = false;
        } else {
            selection.style.webkitAnimation='bounceInUp 1s forwards';
            selection.style.animation='bounceInUp 1s forwards';
            closed = true;
        }
    }
}());

还可以查看浏览器环境中的其他不安全名称。

Also have a look at other unsafe names in browser environments.

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