injecting a parameter into a JavaScript function

Question

injecting a parameter into a JavaScript function

Is it possible to pass a variable called "templateBody" into a function in this code snippet?

function GetMenu(){
 var templates = [{name:"maher",body:"<p>Maher test</p>"},{name:"Jeremy",body:"<p>Jeremy test</p>"}]
 var payload = []
 for (var i = 0; i<templates.length; i++){
   var templateBody = templates[i].body
     payload.push({
       text : templates[i].name,
       onclick: function(templateBody){tinymce.activeEditor.execCommand('mceInsertContent', false, templateBody);}
 })
}
return payload
}

javascript

Answer 1

Answer №1

Passing a variable is only possible when calling a function, which you are not doing in this case. However, since all JavaScript functions act as closures, any variables defined in a higher scope will still be accessible without any special actions needed.

The problem with the provided code arises from the shadowing of the variable templateBody by its own parameter. To resolve this issue, simply remove the conflicting parameter:

function(templateBody) -> function()

Another concern is that a function is being created inside a loop, which can cause complications with closures. There are solutions available, such as those discussed in this link: JavaScript closure inside loops – simple practical example

Answer 2

Passing a variable is only possible when calling a function, which you are not doing in this case. However, since all JavaScript functions act as closures, any variables defined in a higher scope will still be accessible without any special actions needed.

The problem with the provided code arises from the shadowing of the variable templateBody by its own parameter. To resolve this issue, simply remove the conflicting parameter:

function(templateBody) -> function()

Another concern is that a function is being created inside a loop, which can cause complications with closures. There are solutions available, such as those discussed in this link: JavaScript closure inside loops – simple practical example

Answer 3

Answer №2

Here is what you have:

function(templateBody){
  tinymce.activeEditor.execCommand('mceInsertContent', false, templateBody);
}

Based on the property name, it seems like this code will be executed when the user clicks on something ('onclick' event). This will pass an event that will be injected as templateBody into the function, instead of using the previously defined templateBody.

Additionally, the usage of templateBody as a closure in a loop means it may not stay consistent for the specified functions. It's recommended to implement a proper closure pattern like so:

(function(templateBody){
  return function() {
    tinymce.activeEditor.execCommand('mceInsertContent', false, templateBody);
  }
})(templateBody);

Answer 4

Here is what you have:

function(templateBody){
  tinymce.activeEditor.execCommand('mceInsertContent', false, templateBody);
}

Based on the property name, it seems like this code will be executed when the user clicks on something ('onclick' event). This will pass an event that will be injected as templateBody into the function, instead of using the previously defined templateBody.

Additionally, the usage of templateBody as a closure in a loop means it may not stay consistent for the specified functions. It's recommended to implement a proper closure pattern like so:

(function(templateBody){
  return function() {
    tinymce.activeEditor.execCommand('mceInsertContent', false, templateBody);
  }
})(templateBody);

injecting a parameter into a JavaScript function

Answer №1

Answer №2

Similar questions

RequireJS has an unbreakable reliance on the library

Utilize the scrollIntoView method within a jQuery function

What are some ways to slow down the speed of my animation?

Expanding the capabilities of indexable types in Typescript

Receive emails: using the require() function with ES Module

What is the best way to retrieve and save the titles of checked boxes in the Autocomplete using state with hooks?

Make sure to include the "active" class in the pager once the slider begins

Include parameters in the function so that it will only run if the value matches a name in the provided

What could be causing my completed torrents to sometimes not be saved to my disk?

How to sync two carousels in Bootstrap 5 to slide simultaneously with just one click on the next and previous buttons

"Troubleshooting: React Bootstrap Modal not appearing on screen

The function is not able to fetch the value from the Amazon S3 file, however, it is printed

Having trouble parsing FormData in the django backend

React Apollo - Component not re-rendering when result changes

How to Dynamically Set AngularJS Filter (like date or currency) Using Variables

tips for storing user input into an array

Showcasing a JSON file in the interface using $http in AngularJS

How can I retrieve the children of a component in React?

Protected node.js REST API

Modifying attributes of an object within a document using Mongoose