I wrote this function to format a certain string :
var desc = document.getElementById('desc');
var parContent = desc.textContent.trim();
var tempPar = "";
var j = 0;
var k = 0;
var built_val = "";
for (var i = 0; i < parContent.length ; i++)
{
if (j == 19 || i == parContent.length-1)
{
tempPar = parContent.substring(k, i);
tempPar = tempPar.concat("- \n");
built_val = built_val.concat(tempPar);
tempPar = "";
//Restart j
j = 0;
//update k
k = i;
continue;
}
j++;
}
desc.textContent = built_val;
Desc is a dynamic paragraph that is usually empty at first then filled (its data are composed after the page loads), j is the number of characters desired in one line.
Though now I have another problem and that is \\n doesn't work ; I also tried br
. How can I insert a new linebreak within a javascript string such as "built_val" ? please note how it's assigned to an Html
after everything.
The textContent property sets the literal text of the element (by adding a text node), and will not parse your tags as html. Instead, you should do this:
desc.innerHTML = built_val;
Yes, you're using .textContent
which is why <br>
s won't be parsed (which is a good thing!)
You want to use document.createTextNode()
and document.createElement('br')
.
var desc = document.getElementById('desc');
var parContent = desc.textContent.trim();
var tempPar = "";
var j = 0;
var k = 0;
var built_val = "";
for (var i = 0; i < parContent.length; i++) {
if (j == 19) {
tempPar = parContent.substring(k, i);
tempPar = tempPar.concat("- \n");
desc.appendChild(document.createTextNode(tempPar)); desc.appendChild(document.createElement('br'));
tempPar = "";
//Restart j
j = 0;
//update k
k = i;
continue;
}
j++;
}
// No need for textContent anymore. Appending nodes did the work for us!
Just for fun: an Array.forEach
and String.slice
method:
var desc = document.querySelector('#desc'); var parContent = desc.textContent.trim(); var block = 0; parContent.split('').forEach( function(v, i) { if (i % 19 == 0) { desc.appendChild(document.createTextNode(parContent.slice(block, i))); desc.appendChild(document.createElement('br')); block = i; } } ); // last part desc.appendChild(document.createTextNode(parContent.slice(block)));
<p id="desc"> This string should be truncated every 19th position right? Ok, let's give it a try using [Array.forEach]<br> </p>
There's an easy regex version to wrap text as well:
function Wrap(src, maxLineLength) {
return src.replace(new RegExp("(.{1,"+maxLineLength+"})", "g"), "$1<br/>\r\n");
}
Though this wraps on characters, not words.
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