Why am I receiving a typeerror that says "cannot read property of 'match' undefined"?
var numInput = document.getElementById('input');
// Listen for input event on numInput.
numInput.addEventListener('input', function(){
// Let's match only digits.
var num = this.value.match(/^\d+$/);
if (num === null) {
// If we have no match, value will be empty.
this.value = "";
}
}, false)
It appears that this.value is undefined because the function is not using an arrow function ( => ). Please consider the following alternative:
numInput.addEventListener('input', () => {
// We will only accept digits as input.
var num = this.value.match(/^\d+$/);
if (num === null) {
// If no digits are matched, clear the input value.
this.value = "";
}
}, false)
Recently, I integrated a plugin for Ionic from this repository: https://github.com/salesforce-marketingcloud/MC-Cordova-Plugin After successfully configuring it for iOS, I encountered difficulties on Android where the plugin seems to be non-existent. It ...
<router-link to="SOME_ROUTE"> <div class="outer-div"> <div class="inner-div" v-on:click="doSomething"></div> </div> </router-link> I am currently working on creating a link with an image included. My goa ...
I am having trouble viewing uploaded files in the carousel. While I can see video and image files, other document formats are not displaying. Can someone please recommend a solution to enable viewing all types of documents as well? mydata = [] onSelect ...
I encountered an issue while trying to implement PrimeNG into my Angular 4 project. Despite following the setup steps outlined on their website, I received an error message when attempting to import a module. Here's an example of the error: Can' ...
In my database, I have stored the row and column as X and Y coordinates. Is there a straightforward way to write code that can update the text in a specific td element within a table? Here is what I attempted: $('#sTab tr:eq('racks[i].punkt.y&a ...
I am facing an issue with my function that handles asynchronous calls using promises in a sequence within a for loop. The problem is that the loop breaks when an exception occurs, but I need it to continue even after an exception is thrown. Here is my asy ...
I'm currently diving into the world of Polymer. My goal is to connect an array with my user interface in a way that allows for dynamic updates. Each object within the array contains a changing property, and I want my UI to reflect these changes accord ...
Currently, I am working on revamping our web platform at my job. This includes migrating a significant amount of outdated JavaScript/jQuery code to VueJS. We have a "global.js" file that contains our Vue components and a "vendor.js" file that includes Vue ...
I am struggling to load custom fonts from a local directory. Can someone provide assistance? Below is the code I am currently using: @font-face { font-family: 'My Custom Font'; src: url('./fonts/MyCustomFont.eot'); src: url(&apo ...
$('#thankYouMessage').css({"height": textHeight, "margin-top:": "-52px", "padding-left": "19px"}); The CSS property 'padding-left:' will be applied as expected, but the negative margin will not take effect. The 'margin-top:' ...
What is the correct way to remove a value from an array? const ?? = { text: ['some text'] }; ...
I have a scenario where I need to run exec synchronously. Is there an alternative method to achieve this without using the deprecated execSync library? Can bluebird promises be used for this purpose? for (var i = 0; i < testCasesLength; i++) { va ...
Confirming my grasp of the situation here. Material design is an interface building approach developed by Google. Material lite is Google's public implementation of this concept. serves as an independent open-source adaptation. In addition, Angul ...
Currently, I am in the process of developing a webpack+pnpm+typescript+react website. All the versions being used are LTS and my preferred IDE is VSCode. According to the guide provided by Metamask here, it seems like I need to follow these steps: npm i @m ...
When invoking a function from within a useEffect, which is located in a different class, there seems to be an issue with receiving the expected data back. The function call triggers another async function that makes an API call and performs operations on t ...
Currently testing out a library found on this link and encountering a frustrating issue related to potential conflicts in cookie or header authentication. Upon logging into one account, everything runs smoothly. However, attempting to log into a different ...
I've encountered an issue with setting the value of dropdown options in a web page using strings that contain < and >. Here is an example code snippet: <select id="m" name="m" > <option value="" selected="selected" >All</option& ...
I am new to this, so please forgive my lack of knowledge. Currently, I am in the process of creating an Ajax-driven web application for managing user contact groups. This application allows users to store contacts based on assigned groups. Once a user con ...
Is it possible to pass two arguments with ngFor? Here is an example that I would like to achieve: <mat-card *ngFor="let room of arr; let floor of floorArr"> <mat-card-content> <h3>Room Number: {{room}}</h3> <p>Floor ...
I have created a custom Javascript function for extracting specific data from a matrix. The main purpose of the function is to retrieve data based on dates within a given range. Here's how it works: The matrix[0][i] stores date values I need to extr ...