javascript - 等待页面加载的 Applescript

Question

在继续执行 applescript 之前，我尝试了各种解决方案来轮询 elementID。我更喜欢轮询而不是任意延迟。

set pageNotLoaded to true
    set doForThisID to do JavaScript "document.getElementById(‘thisElementID‘);"

    repeat while pageNotLoaded is true
        try
            if (doForThisID contains "thisElementID") then
                set pageNotLoaded to false
            end if
        end try
    end repeat

我尝试了网上提供的各种解决方案，但都无济于事。任何人都可以提供任何建议以使此代码正常工作吗？

Answer 1

您的某些逻辑不正确，令人困惑。此外，最佳做法是通过嵌套 .contains 让 javascript 传递 bool 值。下面是一个脚本，它使用三种方法来测试页面是否已加载:

javascript document.readyState

一个 javascript 文档。包含

一个简单的 Safari 调用文档文本来查找字符串。

您可以更改此脚本以仅使用其中一个。

property testingID : "login"
property testingString : "Username:"

set pageLoaded to false
tell application "Safari"
    repeat while pageLoaded is false
        set readyState to (do JavaScript "document.readyState" in document 1)
        set foundID to (do JavaScript "document.contains(document.getElementById(" & quoted form of testingID & "))" in document 1)
        set pageText to text of document 1

        if (readyState is "complete") and (foundID is true) and (pageText contains testingString) then set pageLoaded to true
        delay 0.2
    end repeat
end tell
display dialog "Ready state of page: " & readyState & return & ¬
    "ID is loaded: " & foundID & return & ¬
    "Test string is loaded: " & testingString