我试图在鼠标单击按钮时更改悬停颜色，但我通过浏览器收到错误消息，请查看下方。
浏览器结果:
VM898 home.php:62 Uncaught TypeError: Cannot read property 'link-privacy-policy' of undefined
at HTMLAnchorElement.<anonymous> (VM898 home.php:62)
at HTMLAnchorElement.handle (jquery-3.4.0.js:5707)
at HTMLAnchorElement.dispatch (jquery-3.4.0.js:5233)
at HTMLAnchorElement.elemData.handle (jquery-3.4.0.js:5040)
Jquery代码
<script>
let color_count = 0;
let colors = [{
"name": "blue",
"btn-change-color": "#7f8ff4",
"btn-start": "#7f8ff4",
"link-privacy-policy": "#7f8ff4"
},
{
"name": "orange",
"btn-change-color": "#f8d745",
"btn-start": "#f8d745",
"link-privacy-policy": "#f8d745"
}];
let btnChangeColor = document.getElementsByClassName("btn-change-color");
let btnStart = document.getElementsByClassName("btn-start");
let linkPrivacyPolicy = document.getElementsByClassName("link-privacy-policy");
$(".btn-change-color").click(function () {
$(btnChangeColor).css("background", colors[color_count]["btn-change-color"]);
$(btnStart).css("background", colors[color_count]["btn-start"]);
$(linkPrivacyPolicy).hover(function () {
$(this).css('color', colors[color_count]["link-privacy-policy"]);
$(this).css('border-bottom', '1px solid ' + colors[color_count]["link-privacy-policy"]);
})
color_count++;
});
</script>
Note : Line 62 starts with this line :
$(this).css('color', colors[color_count]["link-privacy-policy"]);
最佳答案
破译错误消息有时会令人困惑:
Cannot read property 'link-privacy-policy' of undefined
这实际上意味着以下代码...
colors[color_count]["link-privacy-policy"]
...抛出错误，因为 colors[color_count] 的计算结果为 undefined - 因此该值自然没有属性 link-privacy-policy.
@Robin Zigmond 的评论(在我输入此答案时添加)可能会解释您为什么点击 undefined
关于javascript - 鼠标单击按钮时更改悬停颜色，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/55993651/