Tips for defining a function without an arrow as a parameter

Question

Tips for defining a function without an arrow as a parameter

Understand that there may be individuals quick to flag this as a duplicate question, but trust me when I say that I have exhaustively searched on Google for almost an hour before turning to ask here.

  methods: {
    stylizeHeader: debounce(event => {
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    }, 20),
  },

My framework is Vue, and my goal is simply to access the this property within the debounce function in connection with the outer scope, which is a detail of Vue implementation. The main issue lies with the arrow function.

I have tried different syntactical permutations like () { } without success. While using function() { } works fine, it triggers eslint warnings and I prefer to adhere to current conventions.

Is there a proper way to write it in ES6 so that I can successfully access this?

javascript vue.js ecmascript-6 vuejs3

Answer 1

Answer №1

If your `function() {}` is functioning correctly, but the linter is flagging it for not having a name, then simply assign a name to the function.

methods: {
  stylizeHeader: debounce(function debouncedStylizeHeader(event) {
    // ..... your code
  }, 20),
},

Naming functions in this way is primarily for debugging purposes - when an error occurs, the stack trace will include the named function rather than just `anonymous function` or something similar. This can be especially helpful in a large codebase with multiple developers.

It's possible that the linter rules you are following are intended for scenarios like this (large codebases) where naming functions can aid in error debugging.

There's really no downside to naming functions, and it's considered good practice (in my opinion).

Answer 2

If your `function() {}` is functioning correctly, but the linter is flagging it for not having a name, then simply assign a name to the function.

methods: {
  stylizeHeader: debounce(function debouncedStylizeHeader(event) {
    // ..... your code
  }, 20),
},

Naming functions in this way is primarily for debugging purposes - when an error occurs, the stack trace will include the named function rather than just `anonymous function` or something similar. This can be especially helpful in a large codebase with multiple developers.

It's possible that the linter rules you are following are intended for scenarios like this (large codebases) where naming functions can aid in error debugging.

There's really no downside to naming functions, and it's considered good practice (in my opinion).

Answer 3

Answer №2

While I don't specialize in Vuejs development, I prefer working with vanilla JavaScript and NodeJS.

Although I find your code a bit confusing, I believe this is what you intended to write. It seems like your function has two names: stylizeHeader: denounce. However, in Vue, the methods should accept functions rather than an object-like definition. You need to stick with one name.

Consider making this change

  methods: {
    stylizeHeader: debounce(event => {
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    }, 20),
  },

to

  methods: {
    stylizeHeader (event) {
    // You can implement a timer/interval here 
    // to handle the code below
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    },
  },

OR

  methods: {
    debounce (event) {
    // You can implement a timer/interval here 
    // to handle the code below
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    },
  },

However, if your implementation involves a closure, why not try this:

 methods: {
  stylizeHeader (event) {
   debounce() {
    //code
   }
  }
}

Answer 4

While I don't specialize in Vuejs development, I prefer working with vanilla JavaScript and NodeJS.

Although I find your code a bit confusing, I believe this is what you intended to write. It seems like your function has two names: stylizeHeader: denounce. However, in Vue, the methods should accept functions rather than an object-like definition. You need to stick with one name.

Consider making this change

  methods: {
    stylizeHeader: debounce(event => {
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    }, 20),
  },

to

  methods: {
    stylizeHeader (event) {
    // You can implement a timer/interval here 
    // to handle the code below
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    },
  },

OR

  methods: {
    debounce (event) {
    // You can implement a timer/interval here 
    // to handle the code below
      if (event.target.scrollTop <= 1 && !this.scrolled) {
        this.scrolled = true;
        console.log('true');
      } else if (this.scrolled) {
        this.scrolled = false;
        console.log('false');
      }
    },
  },

However, if your implementation involves a closure, why not try this:

 methods: {
  stylizeHeader (event) {
   debounce() {
    //code
   }
  }
}

Tips for defining a function without an arrow as a parameter

Answer №1

Answer №2

Similar questions

Axios is experiencing challenges in transmitting the cookie

There seems to be a hitch in the functioning of the JavaScript codes

Tips for customizing the blinking cursor in a textarea

Having troubles with delayed state changes due to setState being used within useEffect

AngularJS Toggle Directive tutorial: Building a toggle directive in Angular

Incorporating .json files into an HTML template with the help of an HTML form designed for selecting a particular

Transferring data from AJAX to PHP

Is it possible to use v-if when dealing with data that is loaded after computation

Angular does not select the variable_name within the $scope

The AJAX post request is returning an undefined value

The perpetual cycle of redirection through middleware

Fade In Effect in Angular 2 Using SwitchCase

Hiding a Blogger section when its widget is not visible

Tips on obtaining the data count from using the $.get method

When using Vue, it is important to ensure that dynamic slot names error templates are solely utilized for accurately mapping the state to

Create a Nuxt component with styling and webpack to display an image sourced from the

The Typescript decorator is unable to access the property type within its own scope

Cross-origin resource sharing (CORS) is preventing access because the origin and allowed origin match

The custom component I created seems to be unaffected by the inline styles in React

waiting for a task to be carried out