将 Javascript 变量返回到 AppleScript [英] Return Javascript variable to AppleScript

问题描述

所以，我有一个简单的问题，这在 AppleScript 中可能是不可能的.我正在尝试从代码中没有返回的 javascript 返回一个变量.换句话说，我正在尝试获取元素的状态，以便我可以有条件地运行函数.这是我不会得到回报的代码:

So, I have a simple problem which may not be possible in AppleScript. I'm attempting to return a variable from a javascript that doesn't have a return in the code. In other words, I'm trying to get the status of an element so that I can run a function conditionally. Here is the code I have that will not get a return:

tell application "Safari"
    activate
    open location "http://127.0.0.1:9999"
    delay 1
    set myVar to do JavaScript "var obj = document.getElementById(87); myVar = obj.value; return myVar;" in document 1
    return myVar
end tell

所以，基本上我试图获取 obj 的值并将其返回给 AppleScript，它应该在 0 到 255 之间(它是一个按钮).问题是，我无法控制 javascript 函数，因此无法添加 return obj.value.这可能吗?

So, basically I'm trying to get the value of obj and return it to AppleScript, which should be between 0 and 255 (it's a button). The problem is, I don't have any control over the javascript function so I can't add a return obj.value. Is this possible?

推荐答案

删除return"和var".do JavaScript"将返回最后一个全局值.例如，这应该返回 7.0:

Remove the "return" as well as the "var". "do JavaScript" will return the last global value. This, for example, should return 7.0:

tell application "Safari"
    activate
    open location "http://www.hoboes.com/Mimsy/"
    delay 1
    set myVar to do JavaScript "numbervalue=3;fred=numbervalue+4" in document 1
    return myVar
end tell

然而，这应该返回 3.0，因为这是最后一个全局值:

This, however, should return 3.0, as that’s the last global value:

tell application "Safari"
    activate
    open location "http://www.hoboes.com/Mimsy/"
    delay 1
    set myVar to do JavaScript "numbervalue=3; var fred=numbervalue+4" in document 1
    return myVar
end tell

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