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Tag: dom-events
Cannot read property ‘length’ of undefined – after pressing ‘Enter’ key the value become undefined
Why when I’m pressing the Enter key the value of idNumber becomes undefined ? If I click on the button calling checkID() it shows the input’s string length in the console.log(idNumber) It’s just so weird Thanks for everyone. Answer You shouldn’t be assigning event handlers manually in …
How to add style for specific words at HTML using JavaScript?
Could someone help me to write JS function which will take a string(word) as an argument? And then add an additional style (change color for example) for all these words in the HTML. I don’t know where it is located. This “word” can be inside <div>, or <p> or even <b>. Exam…
How to prevent page reload using form.submit() to submit as a method in ReactJs
How to prevent page refreshing on firing form submission programmatically in ReactJS? I’ve tried this code: My goal is to submit form onBlur from this form (when a user fills all the fields and clicks outside of the form) I’ve already checked these solutions but they dont work: Prevent page reload…
reactjs handle click outside an element error
I’m trying to create a function that will detect any click outside of an element. The error says: TypeError: Cannot read property ‘className’ of null The function works just fine when it only contains one of the conditions. Is there any problem with my code? I appreciate any kind of help. An…
Rewrite MutationObserver() with async/await
How can I write this mutation observer code, using async/await? I want to return true after console.log(“Button is appearing…”);. Could someone show me the best way to write this code? I also need to clarify, this code is watching for a button, which appears and then disappears. And the reap…
Click Event Shows And Removes All Overlays Instead Of Individually – JavaScript
I have a wrapper container where I would like is so when I click on the name each piece of info shows just for that wrapper and when I click/close the ‘x’ button it only removes it for that button. Using the forEach() method it is showing and removing all of the inner containers except for just th…
“event” in Javascript is deprecated and I cannot use “preventDefault()”
I am trying to use the event.preventDefault() method but I am continuously receiving error. It says that event has been deprecated. I am making a Firebase SignUp form and I want to prevent the form from Submitting. Here is the complete code. And the useInput code: Answer What that warning means is that the gl…
Remove EventListener defined in a class
I am trying to remove an eventListener but it looks like I miss something. Why is the following code not working, it doesn’t remove the event listener from the button. I also tried binding this to pass the scope, but that didn’t work either Answer Prototype methods as event handlers are a bit prob…
Listen to a specific data attribute in events
I need to listen to a message event that will have a data attribute and depending on this attribute do different actions. Now, I want to test this with a button by dispatching such an event. However, I can only find the detail attribute, but not how to set the data attribute: and How can I send with the data