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Tag Archive for javascriptreactjs

React UI not re-rendering with state update

I’m trying to create an expenses track app using react JS. The problem is that I’m updating the state of the variable, but the UI doesn’t change accordingly. For each new expense added, the idea is that: a) if the expense name already exists, a new line is not created, instead, the value of the new expense is added to the existing value; b) if the expense name does not exist, a new expense line is created.

React UI not re-rendering with state update

I’m trying to create an expenses track app using react JS. The problem is that I’m updating the state of the variable, but the UI doesn’t change accordingly. For each new expense added, the idea is that: a) if the expense name already exists, a new line is not created, instead, the value of the new expense is added to the existing value; b) if the expense name does not exist, a new expense line is created.

React UI not re-rendering with state update

I’m trying to create an expenses track app using react JS. The problem is that I’m updating the state of the variable, but the UI doesn’t change accordingly. For each new expense added, the idea is that: a) if the expense name already exists, a new line is not created, instead, the value of the new expense is added to the existing value; b) if the expense name does not exist, a new expense line is created.

How to delete a nested object inside array of objects

I am trying to delete an object property. I used splice method, also delete method, but I receive “TypeError: Cannot delete property.”. I have a comments array, whose each comment object has replies array of objects, and I am trying to delete one of the object (reply object whose id is 1) inside replies array. And then replacing this comment object with its old version inside commments array. I tried: