我有一個非常基本的代碼。它只是在單擊時更改按鈕的樣式。使用時效果很好，getElementById但我想這樣做XPATH。我是 JavaScript 的新手。我做錯了什么，我怎樣才能做到這一點？
編碼：
<!DOCTYPE html>
<html>
<body>
<p id="demo">Click the button to change the layout of this paragraph</p>
<button onclick="myFunction()">Click Me!</button>
<script>
function myFunction() {
let x = document.getElementByXpath("//html[1]/body[1]/button[1]");
x.style.fontSize = "25px";
x.style.color = "red";
}
</script>
</body>
</html>
uj5u.com熱心網友回復：
查看document.evaluate()
function getElementByXpath(path) {
return document.evaluate(path, document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null).singleNodeValue;
}
function myFunction() {
let x = getElementByXpath("//html[1]/body[1]/button[1]");
x.style.fontSize = "25px";
x.style.color = "red";
}<p id="demo">Click the button to change the layout of this paragraph</p>
<button onclick="myFunction()">Click Me!</button>轉載請註明出處，本文鏈接：https://www.uj5u.com/yidong/341503.html
標籤：javascript html dom 路径
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