dlt.preloadAssets

Introduction

Preload media resource files for the view layer. Currently supports: font, image.

Usage Restrictions

Supported in the basic library from version 4.0.0 onwards.

Parameters

Object object

Property	Type	Default	Required	Description
data	Object[]		Yes	Resources to be preloaded
success	function		No	Callback function for a successful interface call
fail	function		No	Callback function for a failed interface call
complete	function		No	Callback function for the completion of the interface call (executed on both success and failure)

Explanation of data content types

Property	Type	Default	Required	Description
type	string		Yes	Resource type, 'font': font; 'image': image
src	string		Yes	Resource URL

object.success Callback Function

Parameters

Object res

Property	Type	Description
success	string	true - Set successfully

object.fail Callback Function

Parameters

Object res

Property	Type	Description
success	string	false - Set failed

Sample Code

// pages/index/index.js
Page({
  preloadAssets() {
    dlt.preloadAssets({
      data: [
        {
          type: 'image',
          src: imgUrl,
        },
      ],
      success(res) {
        console.log('preloadAssets success', res);
      },
      fail(err) {
        console.log('preloadAssets fail', err);
      },
    });
  },
});

Please note that this translation is based on the information provided in the text, and the function name "dlt.preloadAssets" and other specific terms may need to be adjusted according to the actual context and coding standards of your IT project. Additionally, make sure to define the imgUrl variable with the appropriate image URL before using the sample code.