Is there a way to identify line breaks in a text area using Java script? If two consecutive blank lines are found, remove one of them. If there is only one line present, delete it as well.
I'm currently only able to delete single lines. Can anyone help me with this issue?
Line 1
Line 2
Line3
The desired outcome:
Line 1
Line 2
Line3
Utilize regular expressions to detect and substitute patterns within a string. For example:
value.replace(/(\n\n?)\n+/g, '$1');
var input = document.getElementById('input'),
output = document.getElementById('output');
output.value = input.value.replace(/(\n\n?)\n+/g, '$1');textarea { height: 180px; float: left; }<textarea id="input">
one return
two returns
three returns
four returns
</textarea>
<textarea id="output"></textarea>» Check out Regex 101 for more information.
edit: The initial explanation was ambiguous. Merely removing one line break at a time may not be practical in real-world scenarios, so the original response remains unchanged. Regarding the request to delete a single blank line when there are three or four consecutive blank lines...
value.replace(/(\n*)\n/g, '$1');
var input = document.getElementById('input'),
output = document.getElementById('output');
output.value = input.value.replace(/(\n*)\n/g, '$1');textarea { height: 180px; float: left; }<textarea id="input">
one return
two returns
three returns
four returns
</textarea>
<textarea id="output"></textarea>Using regular expressions to identify more than two consecutive line breaks
$(document).ready(function () {
$('textarea').change(function () {
$(this).val($(this).val().replace(/\n{3,}/g, "\r\n"));
});
});<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<textarea></textarea>Although written in jQuery, the key snippet is: value.replace(/\n{3,}/g, "\r\n")
In my project using Three.js, I have created a vertex shader that assigns colors to each point in a plane based on the quadrant of the screen where a pixel is rendered. // customized vertex shader uniform float width; uniform float height; varying float x ...
Currently, I'm developing a function to download a json file from a website/server and store it in local storage using the following code: function grabJsonData() { var jsonURL = "http://mywebsite.com/data.json"; var xhr = new XMLHttpRequest( ...
I am facing an issue while injecting HTML content from my database using Vue. The problem is that although I can successfully inject the HTML, the framework stylesheet (Vuetify) does not seem to be applied to the injected content. The rest of the page ha ...
I've been attempting to use the "navigate" method from "react-router-dom" to redirect users from the Login screen based on the radio button they click. I've tried using states, but I'm unsure if that's the best approach or if there&apos ...
<script> function updateVariable(value){ document.getElementById("demo").innerHTML=value; } </script> Script to update variable on click <?php $numbers=array(0,1,2,3,4,5); $count=sizeof($numbers); echo'<div class="navbox"> ...
I have a simple app setup where the data (iPhones from the database) is fetched in the AppComponent itself. ngOnInit(): void { this.iphoneservice.fetchIphones(); } The fetchIphones method is located in my iPhoneService file and consists of 3 functio ...
In my current project, I am working on adding a new feature to the existing page. The challenge is to include an element that will be displayed above or below a button, which will serve as a toggle to open or close it. This element needs to be triggered by ...
I have been attempting to create an input field that only accepts numbers, but for some reason it still allows letters to be entered. Why is this happening? <input type="number" pattern="[0-9]" ...
Seeking advice on the most effective approach for calling functions with variable names that adhere to a specific rule. I am exploring alternatives to using eval() due to the numerous concerns raised about its usage online. In my current setup, each group ...
I am currently working on a project using reactJS and I am facing an issue with displaying information from my dictionary. Initially, I attempted to use a "for" loop to display the information, but unfortunately, it did not work as expected. Subsequently, ...
Looking to implement a list filtering system using checkboxes. This is how I am looping through an array from VUEX: <div class="checkbox" v-for="brand in brands" :key="brand.id"> <input name="brands" typ ...
<div class="container" :class="{ qwerty: !open }" :class="lower? 'left' : 'right'"> Hey there, I've noticed that Vue seems to only allow me to add one class with conditions, as shown in the exam ...
In my nuxt application, I encountered a peculiar issue. When I execute npm run dev, everything functions properly. However, after running npm run build and then npm run start, I face the error message stating cannot GET [path of the page here] I noticed t ...
<table id="tab"> <tr aaa="one" bbb="ooo"><td>xxx</td><</tr> <tr aaa="two" bbb="one"><td>xxx</td><</tr> <tr aaa="three" bbb="one"><td>xxx</td><</tr> ...
Currently, I am working on managing two separate Express JS applications. One of them serves as an API, while the other application interacts with this API by sending requests and presenting the received data to users. Within the API route, I am respondin ...
How can I bind an input value to an ng-model as an array? For example, if I enter one, two, three, I want the resulting model to be [ "one","two","three" ]. Currently, this is my approach: <input type="text" ng-model="string" ng-change="convertToArra ...
Here is a unique code snippet showcasing a customized dialog box created with HTML, CSS, and JavaScript. The dialog box is displayed when a button is clicked. <!DOCTYPE html> <html> <head> <style> /* Custom Modal Styles */ .modal { ...
Unique content: I am looking to convert a standard HTML element into an image on an HTML canvas for my website project. I am currently working on creating a website that involves displaying various elements on the screen. One of the key requirements is b ...
Looking for a regex pattern that can validate phone numbers beginning with either 0096279, 0096278, 0096277, or 079, 078, 077. ...
My current challenge involves extracting data from the following link: and storing it in my database. However, I am encountering difficulties with manipulating the array in order to retrieve the last unix datetime. Despite multiple attempts to extract th ...