Angular4 can't find Jquery-UI functions

问题:

I have installed Jquery and Jquery-ui

npm install --save jquery jquery-ui

The files are in the node_modules directory. I have a component that declares Jquery

declare var $: JQueryStatic;

My jquery functions work just fine, but the jquery-ui functions do not.

$('some-div').dropdown(); // works
$('window').draggable(); // draggable is not recognized as a function

So, obviously my inclusion for jquery-ui is not correct. I tried including a bunch of different things in my .angular-cli.json page to no success.

Things I have tried in my .angular-cli file:

...
"scripts": [
    "../node_modules/jquery/dist/jquery.min.js",
    "../node_modules/jquery-ui/ui/widgets/draggable.js",
    "../node_modules/jquery-ui/ui/draggable.js",
]

I tried importing directly into the component, but that gave problems with $ui being defined. I also got errors that defined is not defined.

I have looked at npm jquery-ui and Jquery-ui Upgrade guides

Any ideas where I am going wrong?

回答1:

The solution to define jquery-ui in angular-cli.json (and avoid to add it in index.html) is:

1 : Import jquery-ui-dist

    npm install jquery jquery-ui-dist

2: Add scripts in angular-cli.json

    "scripts": [
       "../node_modules/jquery/dist/jquery.min.js",
       "../node_modules/jquery-ui-dist/jquery-ui.js"
    ],

Source : https://stackoverflow.com/a/38795318

回答2:

HOLY SMOKES! This one was very troublesome, but I figured it out after days of trying.

So, there are a lot of partial answers out there, but this should be complete. You cannot from what I have seen, include jquery-ui in your angular-cli and the index. The plugin inclusions will be overwritten and jquery as a global will be undefined. I couldn't get it to work by using just the angular-cli.json, but I did get it to work by only using index inclusion.

Here is what needs to be done to only use index script inclusion for jquery/jquery-ui.

1: Uninstall jquery and jquery-ui and remove it from the package.json

npm uninstall --save jquery jquery-ui

2: Delete the node_modules folder

3: Delete any references to jquery or jquery-ui in you angular-cli.json file

4: Rebuild the node_modules folders (double check that jquery-ui is not there, but it doesn't really matter so long as the angular-cli.json doesn't have it included.

npm install

5: include jquery, then jquery-ui in your index file. I used 2.2.4, because I don't trust 3 yet.

<script src="https://code.jquery.com/jquery-2.2.4.js" integrity="sha256-iT6Q9iMJYuQiMWNd9lDyBUStIq/8PuOW33aOqmvFpqI=" crossorigin="anonymous"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>

6: In what ever component you want to utilize jquery or jquery plugin inject $

declare var $: any;

$('draggable').draggable(); // WORKS!

回答3:

please import jQuery ui to index.html like this

<script src="https://cdnjs.cloudflare.com/ajax/libs/jqueryui/1.12.1/jquery-ui.min.js"></script>

And decare $ in your component like this

declare var $: any;