如何使用JavaScript模拟对此按钮的点击
我尝试了document.querySelector('.button.input-button.blue').click();
,但是它不起作用。
document.querySelector('.button.input-button.blue').click();
<div class="page-text" style="position: absolute; top: 200px; left: 310px; right: 10px; text-align: center;">
<span style="font-size:24px;letter-spacing:1px;">138</span>
<span style="font-size:20px;letter-spacing:1px;">1</span>
<span style="font-size:24px;letter-spacing:1px;"> / </span>
<span style="font-size:24px;letter-spacing:1px;">138</span>
<span style="font-size:20px;letter-spacing:1px;">3</span>
</div>
<button class="input-button blue" style="position: absolute; top: 244px; right: 30px; width: 187px;">Fill</button>
<button class="input-button red" style="position: absolute; top: 244px; left: 330px; width: 187px;">Sell</button>
我希望点击“蓝色按钮”
答案 0 :(得分:1)
您的选择器错误,应该是这样的document.querySelector('.input-button.blue')
您可以从MDN here检查querySelector文档,下面列出了快速摘要。
您可以使用.
来表示类选择器,即选择具有特定类的元素。
您可以使用#
选择具有ID的元素
按标签名称选择元素时,例如button
,元素名称后面没有任何
let btn = document.querySelector('.input-button.blue');
btn.addEventListener('click', function(){
console.log('Button clicked');
})
btn.click();
<div class="page-text" style="position: absolute; top: 200px; left: 310px; right: 10px; text-align: center;"><span style="font-size:24px;letter-spacing:1px;">138</span><span style="font-size:20px;letter-spacing:1px;">1</span><span style="font-size:24px;letter-spacing:1px;"> / </span><span style="font-size:24px;letter-spacing:1px;">138</span><span style="font-size:20px;letter-spacing:1px;">3</span></div>
<button class="input-button blue" style="position: absolute; top: 244px; right: 30px; width: 187px;">Fill</button>
<button class="input-button red" style="position: absolute; top: 244px; left: 330px; width: 187px;">Sell</button>
答案 1 :(得分:1)
这里有一些问题:
.click()
不是有效的事件侦听器,请使用.onclick = function(){};
或addEventListener
.button.input-button.blue
不存在。我认为您真正的意思是button.input-button.blue
.button.input-button.blue
= {class} .button {class} .input-button {class} .blue
button.input-button.blue
= {element} button {class} .input-button {class} .blue
https://codepen.io/StudioKonKon/pen/QzdoxY
// Get the element node
var blue_button = document.querySelector('button.input-button.blue');
// Add event listener
blue_button.addEventListener(
"click",
function() { console.log("Hello world"); },
false
)
// Simulate use click
blue_button.click();
<div class="page-text" style="position: absolute; top: 200px; left: 310px; right: 10px; text-align: center;">
<span style="font-size:24px;letter-spacing:1px;">138</span>
<span style="font-size:20px;letter-spacing:1px;">1</span>
<span style="font-size:24px;letter-spacing:1px;"> / </span>
<span style="font-size:24px;letter-spacing:1px;">138</span>
<span style="font-size:20px;letter-spacing:1px;">3</span>
</div>
<button class="input-button blue" style="position: absolute; top: 244px; right: 30px; width: 187px;">Fill</button>
<button class="input-button red" style="position: absolute; top: 244px; left: 330px; width: 187px;">Sell</button>