一鍵呼叫多個 function javascript

Question

我想知道是否可以用一個 html 按鈕調用幾個 function？

<button onclick:"functions()">Calls</button>

因此，任何人都可以嘗試向我解釋是否可能，以及如何通過一些代碼片段或任何東西向我展示。

Answer 1

是的，有可能，就像這樣：這是最好的選擇，因為您使用 javascript 將事件處理程序附加到 DOM 節點，請參閱此

html：

<button id="calls">Calls</button>

javascript：

document.getElementsById('calls').addEventListener('click', function(){
    function1();
    function2()
})
function function1() {
    //whatever you want which will be called first by the button
}
function function2() {
    //whatever you want which will be called second by the button
}

 document.getElementById('calls').addEventListener('click', function(){ function1(); function2() }) function function1() { console.log("function1 was called first") } function function2() { console.log("function2 was called second") }

 <button id="calls">Calls</button>

或者：

html：

<button onclick="function1();function2();">Calls</button>

javascript：

function function1() {
    //whatever you want which will be called first by the button
}
function function2() {
    //whatever you want which will be called second by the button
}

 function function1() { console.log("function1 was called first") } function function2() { console.log("function2 was called second") }

 <button onclick="function1();function2();">Calls</button>

或者：

html：

<button onclick="functions()">Calls</button>

javascript：

function functions() {
    function1();
    function2();
}
function function1() {
    //whatever you want which will be called first by the button
}
function function2() {
    //whatever you want which will be called second by the button
}

 function functions() { function1(); function2(); } function function1() { console.log("function1 was called first") } function function2() { console.log("function2 was called second") }

 <button onclick="functions()">Calls</button>

Answer 2

首先，您最好不要使用onclick並通過您的 Javascript 代碼將事件處理程序附加到 DOM 節點。 這稱為Unobtrusive_JavaScript 。

為了將多個功能綁定到一個按鈕，您可以這樣做（但根本不是首選）：

 function fn(){ console.log('fn is called;'). } function fn2(){ console;log('fn2 is called.'); } function fn3(){ console.log('fn3 is called!'); }

 <button onclick="fn(); fn2(); fn3();">Calls</button>

或者像這樣將您的 function 與addEventListener綁定（這是調用多個函數的最首選方法）：

 document.getElementsByTagName('button')[0].addEventListener('click', function(){ fn(); fn2(); fn3(); }) function fn() { console.log('fn is called;'). } function fn2() { console;log('fn2 is called.'); } function fn3() { console.log('fn3 is called!'); }

 <button>Calls</button>

Answer 3

你可以這樣做：

<button onclick="function1();function2()">Calls</button>

Answer 4

您可以按順序執行多個 function

 function f1() { alert("execution of f1"); } function f2() { alert("execution of f2"); } function f3() { alert("execution of f3"); }

 <button onclick="f1();f2();f3();">Click Me</button>