Get text from textarea line by line?

Question

HTML code

<textarea id="test"></textarea>
<button id="button_test">Ok</button>

Javascript

  $(document).ready(function()
  {
     $("#test").val("123e2oierhqwpoiefdhqwopidfhjcospid");
  });
 $("#button_test").on("click",function()
      {
      var as=document.getElementById("test").value;
      console.log(as);
      });

We can get values ​​from textarea line by line using the val and split functions. But is it possible to get the value from textarea line by line for a very long word? In this example, I need to get the output as 123e2oierhqwpoiefdhqwowell pidfhjcospidas as individual values. Jsfiddle link here

Answer 1

You can use something like this. This will enter line breaks in the text box.

Credits: fooobar.com/questions/395275 / ...

$(document).ready(function() {
    $("#test").val("123e2oierhqwpoiefdhqwopidfhjcospid");
});

$("#button_test").on("click", function() {
    ApplyLineBreaks("test");
    var as = document.getElementById("test").value;
    console.log(as);
});

///questions/395275/finding-line-breaks-in-textarea-that-is-word-wrapping-arabic-text/1797775#1797775
function ApplyLineBreaks(strTextAreaId) {
    var oTextarea = document.getElementById(strTextAreaId);
    if (oTextarea.wrap) {
        oTextarea.setAttribute("wrap", "off");
    } else {
        oTextarea.setAttribute("wrap", "off");
        var newArea = oTextarea.cloneNode(true);
        newArea.value = oTextarea.value;
        oTextarea.parentNode.replaceChild(newArea, oTextarea);
        oTextarea = newArea;
    }

    var strRawValue = oTextarea.value;
    oTextarea.value = "";
    var nEmptyWidth = oTextarea.scrollWidth;
    var nLastWrappingIndex = -1;
    for (var i = 0; i < strRawValue.length; i++) {
        var curChar = strRawValue.charAt(i);
        if (curChar == ' ' || curChar == '-' || curChar == '+')
            nLastWrappingIndex = i;
        oTextarea.value += curChar;
        if (oTextarea.scrollWidth > nEmptyWidth) {
            var buffer = "";
            if (nLastWrappingIndex >= 0) {
                for (var j = nLastWrappingIndex + 1; j < i; j++)
                    buffer += strRawValue.charAt(j);
                nLastWrappingIndex = -1;
            }
            buffer += curChar;
            oTextarea.value = oTextarea.value.substr(0, oTextarea.value.length - buffer.length);
            oTextarea.value += "\n" + buffer;
        }
    }
    oTextarea.setAttribute("wrap", "");
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.9.1/jquery.min.js"></script>
<textarea id="test"></textarea>
<button id="button_test">Ok</button>

Run codeHide result

Answer 2

.match(/pattern/g). OP, \w (Find a word character) {start,end}

$("#button_test").on("click",function()
{
  var as=document.getElementById("test").value; 
  console.log(as.match(/(\w{1,22})/g));
});

Answer 3

textarea css, :

CSS

textarea { resize: vertical; }

Javascript

$("#button_test").on("click",function(){
    var as=document.getElementById("test").value;
    var len = document.getElementById("test").cols;
    var chunks = [];

    for (var i = 0, charsLength = as.length; i < charsLength; i += len) {
        chunks.push(as.substring(i, i + len));
    }
    console.log(chunks);
});

Answer 4

<textarea> . cols ( HTML .attr() jQuery). , .

jsFiddle

$("#test").val("123e2oierhqwpoiefdhqwopidfhjcospid");
var newString = $("#test").val().toString();
var splitString = parseInt($("#test").attr("cols"), 10) + 1;
var stringArray = [];
stringArray.push(newString);
var lineOne = stringArray[0].slice(0, splitString);
var lineTwo = stringArray[0].slice(splitString);
var lineBreakString = lineOne + "\n" + lineTwo;
console.log(lineTwo);
$('#test').after("<pre>" + lineBreakString + "</pre>");

$("#test").val("123e2oierhqwpoiefdhqwopidfhjcospid");
var newString = $("#test").val().toString();
var splitString = parseInt($("#test").attr("cols"), 10) + 1;
var stringArray = [];
stringArray.push(newString);
var lineOne = stringArray[0].slice(0, splitString);
var lineTwo = stringArray[0].slice(splitString);
var lineBreakString = lineOne + "\n" + lineTwo;
$('#test').after("<pre>" + lineBreakString + "</pre>");
//console.log(lineBreakString);

pre {
  color: green;
  background: #CCC;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js"></script>
<textarea id="test" cols='21'></textarea>
<button id="button_test">Ok</button>

Hide result

. , .each() for .

Documentation

. slice()

textarea

. push ()

. parseInt ()

. attr ()

Answer 5

This is probably not the best way, but it works, and I hope it can help you. First, I found that textarea allows 8px for the standard fontsize charactere. Example: Textarea with 80px => Allow a line with a maximum value of 10 char, all the others overflow on a new line.

From this you can make a simple function:

$("#button_test").on("click",function()
{
console.clear();
var length_area = $("#test").width();
var length_value = $("#test").val().length;

var index = Math.trunc(length_area/8);

var finalstr = $("#test").val().substring(0, index) + " " + $("#test").val().substring(index);

console.log(finalstr);

});

Here is jsfiddle