Having an if statement change a string back and forth [duplicate]

Question

I am trying to make a button change a string from 'Mode One:' to 'Mode Two:', and when pressed again, changed back to 'Mode One:' and so on and so forth. However when I run this, it will change the first time to 'Mode Two:' but when I press it again, it will not go back to Mode One.

Here is my code:

Flip

<script>

    let currentMode = 'Mode one:'

    flip = () => {
        if(currentMode = 'Mode one:'){
            currentMode = 'Mode Two:'
            console.log(currentMode)
        }else if(currentMode = 'Mode Two:'){
            currentMode = 'Mode one:'
            console.log(currentMode)
        }
    }

</script>

Does this answer your question? What is the difference between the `=` and `==` operators and what is `===`? (Single, double, and triple equals) Also, this useful reference: What does this symbol mean in JavaScript? — IMSoP
– IMSoP, Commented Feb 11, 2022 at 14:31

e-e · Accepted Answer · 2022-02-11 14:31:07Z

1

Since you are using a single "=", that is not comparing values, it is assigning a value. You want to use "==" or "===":

if(currentMode == 'Mode one:'){
   currentMode = 'Mode Two:'
   console.log(currentMode)
}else if(currentMode == 'Mode Two:'){
   currentMode = 'Mode one:'
   console.log(currentMode)
}

answered Feb 11, 2022 at 14:31

e-e

1,3011 gold badge13 silver badges23 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Apollo79 · Accepted Answer · 2022-02-11 14:34:42Z

1

In your if statement, your are assigning a value to a variable. The value of this operation is always true. To compare two values you need the == operator:

<script>

    let currentMode = 'Mode one:'

    flip = () => {
        if(currentMode == 'Mode one:'){
            currentMode = 'Mode Two:'
            console.log(currentMode)
        }else if(currentMode == 'Mode Two:'){
            currentMode = 'Mode one:'
            console.log(currentMode)
        }
    }

</script>

edited Feb 11, 2022 at 14:34

answered Feb 11, 2022 at 14:30

Apollo79

7045 silver badges15 bronze badges

1 Comment

Apollo79 Over a year ago

Oh, I got the wrong row :-)

Collectives™ on Stack Overflow

Having an if statement change a string back and forth [duplicate]

2 Answers 2

Comments

1 Comment

Linked

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

1 Comment

Linked

Related