challenges encountered with the clearTimeout() method in vue.js

Question

challenges encountered with the clearTimeout() method in vue.js

I am currently working on implementing a shopping cart using Vue, but I am encountering some challenges. As I am new to using this library, it is possible that I am making some basic mistakes. Here is the issue I am facing:

When I add an item to the cart, I have an onclick function called expander(item) that performs the following actions:

this.addToCart(item);
this.show = true;
clearTimeout(this.timer);
timer: setTimeout(()=>{ this.show = false; }, 3000);

Essentially, this function adds the item to the cart, makes the cart div visible, and then after a delay of three seconds, hides the cart div again.

However, the issue I am facing is that the clearTimeout(this.timer) does not seem to work. This means that regardless of my actions, after three seconds, the visibility of the cart div always reverts to false. From my research, it appears that I am implementing the timer reset correctly in the function.

My assumption is that I may need to declare the variable

timer: setTimeout(()=>{ this.show = false; }, 3000);

outside of the function in order for clearTimeout() to locate it at the beginning of my function. However, no matter where I declare it - whether in my data {} or outside the Vue instance - it does not seem to be recognized within my functions.

Therefore, my question is: how should I declare the variable? Is this even the root of my problem? Are there simpler solutions to this issue than what I am currently attempting to implement?

Thank you in advance!

javascript vue.js

Answer 1

Answer №1

When looking at the referenced code, pay close attention to this specific line:

timer: setTimeout(()=>{ this.show = false; }, 3000);

This line actually creates a labelled statement and does not store the timer handle anywhere. To store it in this.timer, you should assign it like this:

this.timer = setTimeout(()=>{ this.show = false; }, 3000);

(The timer: syntax is typically used to assign within an object initializer [{ ... }], not outside of it.)

Answer 2

When looking at the referenced code, pay close attention to this specific line:

timer: setTimeout(()=>{ this.show = false; }, 3000);

This line actually creates a labelled statement and does not store the timer handle anywhere. To store it in this.timer, you should assign it like this:

this.timer = setTimeout(()=>{ this.show = false; }, 3000);

(The timer: syntax is typically used to assign within an object initializer [{ ... }], not outside of it.)

Answer 3

Answer №2

Ensure there is a 1-second delay between each keypress event,
If the user presses a key, the setTimeout function is cleared and a new one is set with an additional 1-second delay
If the user does not press any keys within 1 second, the previous setTimeout function expires and triggers another function (a method in VueJs)
List item

I implemented this solution to verify if the user has finished typing before making an API call:

data: {
    search: '',
    time:null,
    },
watch: {
    search: function (search) {
        var self = this;
        console.log('Search keypress: ' + search);
        if (search.length >= 3) {
            if (this.time) {
                clearTimeout(this.time);
            }
            this.time = setTimeout( () => this.searchOnline(search), 1000);
            console.log('Search online or wait for the user to finish typing?');
        }
    },
},
methods:{
    searchOnline: function(search){
        console.log('Starting online search: ' + search);
        // axios call to API search endpoint
        console.log('Online search completed!');
    },
}

Answer 4

Ensure there is a 1-second delay between each keypress event,
If the user presses a key, the setTimeout function is cleared and a new one is set with an additional 1-second delay
If the user does not press any keys within 1 second, the previous setTimeout function expires and triggers another function (a method in VueJs)
List item

I implemented this solution to verify if the user has finished typing before making an API call:

data: {
    search: '',
    time:null,
    },
watch: {
    search: function (search) {
        var self = this;
        console.log('Search keypress: ' + search);
        if (search.length >= 3) {
            if (this.time) {
                clearTimeout(this.time);
            }
            this.time = setTimeout( () => this.searchOnline(search), 1000);
            console.log('Search online or wait for the user to finish typing?');
        }
    },
},
methods:{
    searchOnline: function(search){
        console.log('Starting online search: ' + search);
        // axios call to API search endpoint
        console.log('Online search completed!');
    },
}

Answer 5

Answer №3

When using setTimeout, an id is generated
Store this id in a variable
Use this variable to clear the timeout using clearTimeout

According to MDN: The timeoutID returned is a positive integer that identifies the timer created by setTimeout(); this value can be passed to clearTimeout() to cancel the timeout.

In my experience with Vuejs, the following steps have worked for me.

data: {
myToid:null,
}, ....

methods: {
 myTofunction: function(){
    clearTimeout(this.myToid);
    this.myToid = setTimeout(() => {
        ...my function code...;
    }, 6000);
 }
}

Each time I call myTofunction, it clears any existing setTimeout id (stored in myToid) and then sets a new id.

Answer 6

When using setTimeout, an id is generated
Store this id in a variable
Use this variable to clear the timeout using clearTimeout

According to MDN: The timeoutID returned is a positive integer that identifies the timer created by setTimeout(); this value can be passed to clearTimeout() to cancel the timeout.

In my experience with Vuejs, the following steps have worked for me.

data: {
myToid:null,
}, ....

methods: {
 myTofunction: function(){
    clearTimeout(this.myToid);
    this.myToid = setTimeout(() => {
        ...my function code...;
    }, 6000);
 }
}

Each time I call myTofunction, it clears any existing setTimeout id (stored in myToid) and then sets a new id.

challenges encountered with the clearTimeout() method in vue.js

Answer №1

Answer №2

Answer №3

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