javascript - How to call setInterval method regularly in vue.js

Question

methods: {
    A: function() {
        setInterval(function(){ 
            this.B();
        },500)
    },
    B: function() {
        console.log('func B')
    }
}

Writing like this will report an error. How to achieve such an effect?

Answer 1

You can use arrow functions

methods: {
    A: function() {
        setInterval(() => { 
            this.B();
        }, 500)
    },
    B: function() {
        console.log('func B')
    }
}

or

methods: {
    A: function() {
        setInterval(this.B, 500)
    },
    B: function() {
        console.log('func B')
    }
}

Answer 2

methods: {
    A () {
        let that = this;
        setInterval(function(){ 
            that.B();
        },500)
    },
    B () {
        console.log('func B')
    }
}