多个按钮将使用javascript中的一个功能将一个文本字段更改为该按钮的值

Question

okay so i have 10 buttons that are displayed 0 through to 9. There is a text field below that will display " button 3 is clicked" or "button 0 is clicked" depending on what button has been clicked and so on. However i have to achieve this with one function so my code looks a little something like this.

    <button onClick="changeNumber()">0</button>
    <button onClick="changeNumber()">1</button>
    <button onClick="changeNumber()">2</button>
    <button onClick="changeNumber()">3</button>
    <button onClick="changeNumber()">4</button>
    <button onClick="changeNumber()">5</button>
    <button onClick="changeNumber()">6</button>
    <button onClick="changeNumber()">7</button>
    <button onClick="changeNumber()">8</button>
    <button onClick="changeNumber()">9</button>
        <br/>
        <br/>
    <input type="text" id="garlicBread1" size="50%"> 

Im not sure how to make function changeNumber()

Answer 1

You can use something like this. You can pass the reference of the element to the event handler and later use that to get the innerHTML

 function changeNumber(elm) { document.getElementById('garlicBread1').value = 'button ' + elm.innerHTML + ' is clicked'; } 

 <button onClick="changeNumber(this)">0</button> <button onClick="changeNumber(this)">1</button> <button onClick="changeNumber(this)">2</button> <button onClick="changeNumber(this)">3</button> <button onClick="changeNumber(this)">4</button> <button onClick="changeNumber(this)">5</button> <button onClick="changeNumber(this)">6</button> <button onClick="changeNumber(this)">7</button> <button onClick="changeNumber(this)">8</button> <button onClick="changeNumber(this)">9</button> <br/> <br/> <input type="text" id="garlicBread1" size="50%"> 

Answer 2

You may like to use querySelectorAll and and attach event listener to the button instead of adding onclick to each & every button. Then use template literal to create the string and attach it to the value of the input

 let getButtons = document.querySelectorAll('button').forEach((item) => { item.addEventListener('click', function(e) { let txt = e.target.textContent document.getElementById('garlicBread1').value = `button ${txt} is clicked` }) }) 

 <button>0</button> <button>1</button> <button>2</button> <button>3</button> <button>4</button> <button>5</button> <button>6</button> <button>7</button> <button>8</button> <button>9</button> <br/> <br/> <input type="text" id="garlicBread1" size="50%"> 

Answer 3

agree with dk, just use it like this

 <button onClick="changeNumber()">0</button>
    <button onClick="changeNumber(1)">1</button>
    <button onClick="changeNumber(2)">2</button>
    <button onClick="changeNumber(3)">3</button>
    <button onClick="changeNumber(4)">4</button>
    <button onClick="changeNumber(5)">5</button>
    <button onClick="changeNumber(6)">6</button>
    <button onClick="changeNumber(7)">7</button>
    <button onClick="changeNumber(8)">8</button>
    <button onClick="changeNumber(9)">9</button>
        <br/>
        <br/>
    <input type="text" id="garlicBread1" size="50%"> 

and in your function

function changeNumber(number){
console.log(number);
}

Answer 4

Well, you can do something like this:

 <button onClick="changeNumber(0)">0</button>
        <button onClick="changeNumber(1)">1</button>
        <button onClick="changeNumber(2)">2</button>
        <button onClick="changeNumber(3)">3</button>
        <button onClick="changeNumber(4)">4</button>
        <button onClick="changeNumber(5)">5</button>
        <button onClick="changeNumber(6)">6</button>
        <button onClick="changeNumber(7)">7</button>
        <button onClick="changeNumber(8)">8</button>
        <button onClick="changeNumber(9)">9</button>
            <br/>
            <br/>
        <input type="text" id="garlicBread1" size="50%"> 

    <script>
    function changeNumber(val){
     document.getElementById("garlicBread1").value =
        val + "clicked";
    }
    </script>