I have 3 inputs:
<input type="text" id="id-1">
<input type="text" id="id-2">
<input type="text" id="id-3">
I have a button which calls a function:
<button onclick="myfunction()">click me</button>
This is the JS-function which gets called, it gets the value of all inputs and displays the whole value in a textarea:
function myfunction() { var x = "MyText1: " + document.getElementById("id-1").value + "MyText2: " + document.getElementById("id-2").value + "MyText3: " + document.getElementById("id-1").value; document.getElementById("mytext").innerHTML = x; }
This is the area where the functions shows the text of the input fields:
<textarea id="mytext"></textarea>
So far so good. The textarea looks like this:
"MyText1: input of id-1" "MyText2: input of id-2" "MyText3: input of id-3"
What I want to achieve is the following output:
"MyText1: input of id-1"
"MyText2: input of id-2"
"MyText3: input of id-3"
My problem is, when I add document.write("\\n");
to the script, the page crashs with following console text: Uncaught TypeError: Cannot read property 'value' of null
.
Here a working demo without newline: https://jsfiddle.net/6nw8jrk9/
You can add a newline character ( \\n
) to the end of each line when you build your string x
like so:
var x =
"MyText1: " + document.getElementById("id-1").value + '\n' +
"MyText2: " + document.getElementById("id-2").value + '\n' +
"MyText3: " + document.getElementById("id-1").value;
See working example below:
function myfunction() { var x = "MyText1: " + document.getElementById("id-1").value + '\\n' + "MyText2: " + document.getElementById("id-2").value + '\\n' + "MyText3: " + document.getElementById("id-1").value; document.getElementById("mytext").innerHTML = x; }
<input type="text" id="id-1"> <input type="text" id="id-2"> <input type="text" id="id-3"> <br /> <textarea id="mytext"></textarea> <button onclick="myfunction()">click me</button>
Alternatively, you can use ES6's template literals :
function myfunction() { var x = `MyText1: ${ document.getElementById("id-1").value} MyText2: ${document.getElementById("id-2").value} MyText3: ${document.getElementById("id-1").value}`; document.getElementById("mytext").innerHTML = x; }
<input type="text" id="id-1"> <input type="text" id="id-2"> <input type="text" id="id-3"> <br /> <textarea id="mytext"></textarea> <button onclick="myfunction()">click me</button>
You should append \\n
after each input value.
<script>
function myfunction() {
var x =
"MyText1: " + document.getElementById("id-1").value + '\n' +
"MyText2: " + document.getElementById("id-2").value + '\n' +
"MyText3: " + document.getElementById("id-1").value;
document.getElementById("mytext").innerHTML = x;
}
</script>
You can just add line breaks to your var x
var x =
"MyText1: " + document.getElementById("id-1").value + '\n' +
"MyText2: " + document.getElementById("id-2").value + '\n' +
"MyText3: " + document.getElementById("id-1").value;
You can break a line into an textarea with \\n
or with the HTML entitie
var x = "MyText1: " + "valueInput" + "\\n" + "MyText2: " + "valueInput" + " " + "MyText3: " + "valueInput"; document.getElementById("mytext").innerHTML = x;
<textarea id="mytext"></textarea>
use document.getElementById("mytext").value = x;
eg:
<input type="text" id="id-1" value="aa" /> <input type="text" id="id-2" value="bb" /> <input type="text" id="id-3" value="cc" /> <textarea id="mytext"></textarea> <button onclick="myfunction()">click me</button> <script> function myfunction() { var x = "MyText1: " + document.getElementById("id-1").value + "\\nMyText2: " + document.getElementById("id-2").value + "\\nMyText3: " + document.getElementById("id-3").value; document.getElementById("mytext").value = x; } </script>
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