将当前元素传递给onClick函数-React Jsx

Question

I have a div, i want to pass this div to onlick function and change it's class (or add class).

<div className="history-node" onClick={() => this.handleHistoryClick(this)}>
     <span className="history-title">Uploaded</span>
     <span className="history-date">October 9, 2017</span>
</div>

Function is:

handleHistoryClick(el){
      console.log("History Clicked");
      console.log(el);
}

But this is printing current React Component Class which is Paymentdetail .

What i want is:

handleHistoryClick(el){
     $(el).addClass('active');
}

EDIT: I have multiple history-node elements. So adding state to change class won't work for multiple elements.

How do i achieve this?

Answer 1

this in your code refer to the component and not the element:

<div className="history-node" onClick={() => this.handleHistoryClick}>
     <span className="history-title">Uploaded</span>
     <span className="history-date">October 9, 2017</span>
</div>

component :

handleHistoryClick(event){
      let el = event.target;
      el.classList.add('active');
      // $(el).addClass('active'); I'm not familiar with jquery but try it
}

edit : As @sag1v said : it is better to bind the handler in the constructor (or use arrow function) instead of creating a new function instance on each render. just like this :

constructor(){
   this.handleHistoryClick= this.handleHistoryClick.bind(this);
}

Answer 2

Instead of using this.handleHistoryClick(this)}>

use this...

this.handleHistoryClick.bind(this)}>