我需要一些帮助,只需在使用requireJS
时加载模块这是我的main.js
require(['jquery', 'path/somemodule'],
function($, somemodule) {
$(document).ready(function() {
somemodule.init()
})
})
和somemodule.js
define(['jquery', 'path/someothermodule'], function ($, someothermodule) {
"use strict";
var somemodule;
somemodule = {
init: function () {
someothermodule.init()
}
}
return somemodule;
)}
现在somemodule.js和someothermodule.js被加载到所有页面上。我如何只在需要时加载它?
答案 0 :(得分:7)
当您需要使用标准的define()语法从module1获取module2时,在完全加载module2之前,module1将不会加载/运行。看起来像这样:
// inside module1
define(['module2'], function(mod2) {
// we don't get here until AFTER module2 has already been loaded
});
lazy-load module2的替代方案如下所示:
// inside module1
define([], function() {
require(['module2'], function(mod2) {
// we don't get here until AFTER module2 has already been loaded
});
// but we DO get here without having loaded module2
});
现在你必须仔细编程,以确保不会遇到任何异步问题。
在您的情况下,您可以修改main.js文件
require(['jquery'],
function($) {
// jquery is loaded, but somemodule has not
if(thisPageNeedsSomeModule) {
require(['path/somemodule'],
function(somemodule) {
// now somemodule has loaded
$(document).ready(function() {
somemodule.init()
})
});
}
})
答案 1 :(得分:0)
您的main.js文件将加载提供给它的任何文件路径,只要应用程序的其他元素将它们指定为依赖项即可。请参阅我的示例main.js文件:
require.config({
paths: {
'app': 'app',
'underscore':'bower_components/underscore/underscore-min',
'backbone':'bower_components/backbone/backbone-min',
'marionette':'bower_components/backbone.marionette/lib/backbone.marionette.min',
'jquery': 'bower_components/jquery/jquery.min',
'tpl':'bower_components/requirejs-tpl/tpl',
'bootstrap':'bower_components/bootstrap/dist/js/bootstrap.min',
'leaflet':'bower_components/leaflet/leaflet',
'leaflet.markercluster':'bower_components/leaflet/leaflet.markercluster',
},
shim: {
'underscore': {
exports: '_'
},
'leaflet': {
exports: 'L'
},
'leaflet.markercluster': {
deps: ['leaflet']
},
'backbone': {
deps: ['underscore']
},
'marionette': {
deps: ['backbone']
},
'jquery': {
exports: '$'
},
'bootstrap': {
deps: ['jquery']
},
'app': {
deps: ['jquery', 'leaflet','bootstrap', 'leaflet.markercluster', 'marionette', 'tpl']
},
'app.elem': {
deps:['app']
},
'app.api': {
deps:['app']
}
}
})
require(['app','app.api','app.elem'], function() {
App.start();
})
我的初始申请文件:
define(['router', 'collections/moments'], function(router, momentCollection) {
// Boot the app!
App = new Marionette.Application();
App.LocResolve = false; // Have we resolved the user's location?
App.Locating = true; // Are we actively tracking the user's location?
App.FileReader = window.FileReader ? new FileReader : null;
App.Position = null; // Instant access to Lat & Lng of user.
App.MomentsRaw = null; // Keep cached copy of returned data for comparison.
App.Moments = new momentCollection; // Current collection of moments.
App.Markers = new L.MarkerClusterGroup(); // Create Marker Cluster Group
App.View = null; // Current view.
// Marionette Regions
App.addRegions({
header: '#header',
map: '#map',
list: '#list',
modal: '#modal',
});
return App
})
我注意到你没有传递配置对象 - 这是故意的吗?如果您使用构建优化器R.js,它将自动删除未使用的供应商文件。
简而言之,在require.js配置中设置供应商文件的路径,然后在需要特定资产时通过define()调用它们。这将确保仅使用您需要的文件。希望这有帮助!