Single Function to Control Multiple Events in React JS

Published: 05 May 2022
on channel: WebStylePress

4,797

How to use single click handler to handle multiple different click events in ReactJS? React JS is all about doing more with less code. We have an app that has multiple items. Clicking plus or minus increases or decreases quantity for different items. All by using one click handler. One function.

We are going to build multiple events handler in React JS by using one function. Tutorial teaches you how to use single click handler for multiple different click events in React JS.

In our component state we have quantity for different items. Item names and their quantity. In JSX we have item name, plus and minus buttons to increase or decrease quantity and quantity number. We will use two parameters in same click handler function for all buttons. Click handler will take item name and action. Action can be up or down depending upon button.

In function we take previous state and for the passed item, we see if action is up, its quantity is increased in state otherwise we decrease quantity. If i click minus button, quantity goes in negative value. To handle that we will use a check for the button. Use disabled attribute if quantity becomes 0 or less than 0 to prevent quantity going in negative value.

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