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

问题描述

所以，我有一个在AppleScript中可能无法实现的简单问题。我试图从代码中没有返回的javascript返回一个变量。换句话说，我试图获取元素的状态，以便我可以有条件地运行一个函数。这是我得到的代码，不会得到回报：

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，基本上我是试图获取 obj 的值并将其返回到AppleScript，它应该在0到255之间（它是一个按钮）。问题是，我对javascript函数没有任何控制权，所以我无法添加 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以及var。 do JavaScript将返回最后的全局值。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，因为那是最后的全局值：

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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