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I am attempting to create a tool that takes an input text and splits it into chunks of text at a certain # of characters. However, I need to make sure it does not split the text in the middle of a word.
In my case, I am splitting the string after 155 characters.
I've done quite a lot of searching to try and find a solution, but I fear it may be more complicated than my knowledge of Javascript allows me to figure out. I believe I just need to make some sort of logic that has the splitter backtrack to a space to split if it is in the middle of a word, but I am not sure how to write out such a thing.
Here is my javascript code at the moment:
function splitText() {
"use strict";
var str = document.getElementById("user_input").value;
var size = 195;
var chunks = new Array(Math.ceil(str.length / size)),
nChunks = chunks.length;
var newo = 0;
for (var i = 0, o = 0; i < nChunks; ++i, o = newo) {
newo += size;
chunks[i] = str.substr(o, size);
}
var newq = 0;
for (var x = 0, q = 0; x < nChunks; ++x, q = newq) {
$("#display").append("<textarea readonly>" + chunks[x] + "</textarea><br/>");
}
}
And here is my HTML:
<body>
<content>
<h1>Text Splitter</h1>
<form>
<label>Enter a Message</label>
<input type="text" name="message" id="user_input">
</form>
<form>
<input type="button" onclick="splitText();" id="submit" value="Submit!"> <br/>
</form>
<label>Your split message: </label>
<p><span id='display'></span></p>
</content>
</body>
Here is the code in its current working form, if you'd like to take a look: https://jsfiddle.net/add4s7rs/7/
Thank you! I appreciate any assistance!
967
A short and simple way to split a string into chunks up to a certain length using a regexp:
const chunks = str.match(/.{1,154}(\s|$)/g);
some examples:
const str = 'the quick brown fox jumps over the lazy dog';
console.log(str.match(/.{1,10}(\s|$)/g))
console.log(str.match(/.{1,15}(\s|$)/g))This works because quantifiers (in this case {1,154}) are by default greedy and will attempt to match as many characters as they can. putting the (\s|$) behind the .{1,154} forces the match to terminate on a whitespace character or the end of the string. So .{1,154}(\s|$) will match up to 154 characters followed by a whitespace character. The /g modifier then makes it continue to match through the entire string.
To put this in the context of your function:
function splitText() {
"use strict";
var str = document.getElementById("user_input").value;
var chunks = str.match(/.{1,154}(\s|$)/g);
chunks.forEach(function (i,x) {
$("#display").append("<textarea readonly>" + chunks[x] + "</textarea><br/>");
});
}
Note (as has been pointed out in the comments) that this code will fail if one of the words in the string is longer than the length of the chunks.
60
you could use a simple function like this:
function split(string) {
for(i=154; i>=0; i--) {
if(string.charAt(i) == " ") {
var newString1 = string.slice(0, i);
var newString2 = string.slice(i);
}
}
}
Instead of assigning to separate strings you can always put them into an array if you'd like as well.
33
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