What steps can be taken once the browser has completed all rendering processes?

Question

What steps can be taken once the browser has completed all rendering processes?

I have a large form that functions on older PCs. This form is a component of a thin client system and is implemented using AngularJS to create a Single Page Application. One of the tabs on the SPA includes this form.

Upon opening the form, requests are sent to the backend to retrieve data. Based on the responses, AngularJS utilizes the ngIf and ngShow directives to dynamically build the form.

The lifecycle of this process is as follows: 1) Retrieve permissions and data 2) Render specific fields (based on permissions) using the retrieved data

The form consists of approximately 150 fields, which can cause some delay as the browser renders around 80-100 components. However, this is not the issue being discussed in this post...

There is a glass pane overlay on the form, which should be displayed until the form is fully loaded. The challenge lies in controlling the visibility of the glass pane only upon certain actions. The current approach involves:

Enable the glass pane
Initiate data and permissions API requests
Receive responses from the API requests
Disable the glass pane
Render fields based on permissions

The issue arises when the browser continues rendering fields after the glass pane has been disabled.

Is there a way to disable the glass pane after the browser has completed rendering the DOM?

The code snippet in question is:

makePermissionsRequest().then(function (permissionsModel) {
  $scope.permissionsModel = permissionsModel;
});

javascript angularjs forms

Answer 1

Answer №1

To achieve the desired outcome, consider implementing a mutation observer in your code.

let observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    // Update the necessary elements based on the mutation
  });    
});

// Configure the observer:
let config = { attributes: true, childList: true, characterData: true };

let target = ... // Choose the specific form element using a selector

// Start observing the target node with the specified configurations
observer.observe(target, config);

Answer 2

To achieve the desired outcome, consider implementing a mutation observer in your code.

let observer = new MutationObserver(function(mutations) {
  mutations.forEach(function(mutation) {
    // Update the necessary elements based on the mutation
  });    
});

// Configure the observer:
let config = { attributes: true, childList: true, characterData: true };

let target = ... // Choose the specific form element using a selector

// Start observing the target node with the specified configurations
observer.observe(target, config);

What steps can be taken once the browser has completed all rendering processes?

Answer №1

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