Is there a way to get checkbox's checked value in array? [React]

Question

This checkbox [ looks like toggle button] generated based on data. I want to get checked values in an array.

Code

{this.state.customersmsselect.map((e, key) => {
  
  if(e.isactive == "ON"){
  return (
    <div key={key}>
      <div className="form-group col-md-8">
        <label className="col-md-4 control-label">{e.notificationtype}</label>
        <div className="col-md-4 smart-form">
          <label className="toggle">
            <input type="checkbox" id={"smscheckbox" + key} value={e.isactive + "," + e.smstemplateid} name={"checkbox-toggle"+e.smstemplateid} onChange={this.onChangeFavorite} defaultChecked />
            <i data-swchoff-text='OFF' data-swchon-text='ON' ></i>
        </label>
      </div>
    </div>
    <div style={{ margin: 10 }}>&nbsp;</div>
    </div>
  );

My onChange method

If click on that button then I will get, that button's name.

   onChangeFavorite(event) {
     if(!event.target.checked){
        console.log(event.target.name);
     }
   };

My customersmsselect array looks like

0: {smstemplateid: "1", notificationtype: "Invoice Details", isactive: "ON"}
1: {smstemplateid: "2", notificationtype: "Payment Thank-You", isactive: "ON"}
2: {smstemplateid: "3", notificationtype: "Daily Closing Balance", isactive: "OFF"}
3: {smstemplateid: "4", notificationtype: "Monthly Closing Balance", isactive: "ON"}

Problem

I want to get all the checked values in an array when I click on the button.

looks like duplicate : stackoverflow.com/questions/590018/… — Darpan Rangari
– Darpan Rangari, Commented Sep 9, 2019 at 11:48
I want a solution to react, I do not want to use Jquery to manipulate DOM — Akash Thoriya
– Akash Thoriya, Commented Sep 9, 2019 at 11:50
You have to capture the CheckBox state in the OnChange event and store it in a state object. Then get the values from State whenever required — SelvaS
– SelvaS, Commented Sep 9, 2019 at 11:59

XPD · Accepted Answer · 2019-09-09 13:01:11Z

Here we can instead use controlled inputs. Then we need to bind the checked attribute and set the state in onChange handler. checked={e.isactive === "ON"} checks the checkbox depending on the value. onChange={()=>this.onChangeFavorite(e)} will attach the event handler along with the customersmsselect item which is being mapped.

x.isactive = x.isactive === "OFF" ? "ON" : "OFF";
        this.setState({
          customersmsselect: this.state.customersmsselect
});

Does the required checking of the input.

{this.state.customersmsselect.map((e, key) => {
  $('#s').val(key);
  if(e.isactive == "ON"){
  return (
    <div key={key}>
      <div className="form-group col-md-8">
        <label className="col-md-4 control-label">{e.notificationtype}</label>
        <div className="col-md-4 smart-form">
          <label className="toggle">
            <input type="checkbox" id={"smscheckbox" + key} value={e.isactive + "," + e.smstemplateid} name={"checkbox-toggle"+e.smstemplateid} onChange={()=>this.onChangeFavorite(e)} checked={e.isactive === "ON"} />
            <i data-swchoff-text='OFF' data-swchon-text='ON' ></i>
        </label>
      </div>
    </div>
    <div style={{ margin: 10 }}>&nbsp;</div>
    </div>
  );

Then

onChangeFavorite(x) {
     //Here now we are directly changing the array element value. 
     //Since its in the state when we change and assign it will automatically
     //update the controlled components.


    x.isactive = x.isactive === "OFF" ? "ON" : "OFF";
    this.setState({
      customersmsselect: this.state.customersmsselect
    });
};

NNH · Accepted Answer · 2019-09-09 11:57:17Z

1

you can try use ref like this:

{this.state.customersmsselect.map((e, key) => {
  $('#s').val(key);
  if(e.isactive == "ON"){
  return (
    <div key={key}>
      <div className="form-group col-md-8">
        <label className="col-md-4 control-label">{e.notificationtype}</label>
        <div className="col-md-4 smart-form">
          <label className="toggle">
            <input type="checkbox" id={"smscheckbox" + key} value={e.isactive + "," + e.smstemplateid} name={"checkbox-toggle"+e.smstemplateid} onChange={this.onChangeFavorite} defaultChecked ref={node => { this.checkBoxes[key] = node; }} />
            <i data-swchoff-text='OFF' data-swchon-text='ON' ></i>
        </label>
      </div>
    </div>
    <div style={{ margin: 10 }}>&nbsp;</div>
    </div>
  );

then you can refer to this.checkBoxes as a regular array

answered Sep 9, 2019 at 11:57

NNH

2855 silver badges11 bronze badges

2 Comments

SelvaS Over a year ago

I think ref is not required here. We can achieve this without ref.

NNH Over a year ago

agree for the way you mentioned.

dw_ · Accepted Answer · 2019-09-09 12:57:05Z

Your input field:

<input type="checkbox" id={"smscheckbox" + key} value={e.isactive} name={"checkbox-toggle"+e.smstemplateid} onChange={(event) => this.onChangeFavorite(event, key)} checked={e.isactive === "ON"} />

Your onChange event:

onChangeFavorite(event, index) {
  const shouldBeOnOrOff =
    this.state.customersmsselect[index].isactive === "ON" ? "OFF" : "ON";
  this.setState({
    customersmsselect: this.state.customersmsselect.map((item, i) =>
      index === i ? { ...item, isactive: shouldBeOnOrOff } : item
    )
  });
}

This will give you an array of objects that are currently ON:

this.state.customersmsselect.filter((item) => item.isactive === "ON");

This will give you an array of IDs that are currently ON, which I assume is the value you want?

this.state.customersmsselect.filter((item) => item.isactive === "ON").map((item) => item.smstemplateid);

DEMO: https://codesandbox.io/s/quiet-morning-j6dbx?fontsize=14

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