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Spring boot webjars: unable to load javascript library through webjar

I have a spring boot (I use Thymeleaf for templating) project where I want to use some jQuery libraries.

Unfortunately, the webjars aren't loading at all. I have tried many configuration but all of them failed.

Here is the code snippet of my HTML page:

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head lang="en">

<title>JAC</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>

<script src="http://cdn.jsdelivr.net/webjars/jquery/2.1.4/jquery.js"
        th:src="@{/webjars/jquery/2.1.4/jquery.min.js}" type="text/javascript"></script>
<script src="http://cdn.jsdelivr.net/webjars/jquery-file-upload/9.10.1/jquery.fileupload.js"  type="text/javascript"
        th:src="@{/webjars/jquery-file-upload/9.10.1/jquery.fileupload.min.js}"></script>
<link href="http://cdn.jsdelivr.net/webjars/bootstrap/3.3.5/css/bootstrap.min.css"
      th:href="@{/webjars/bootstrap/3.3.5/css/bootstrap.min.css}"
      rel="stylesheet" media="screen" />
<link href="http://cdn.jsdelivr.net/webjars/jquery-file-upload/9.10.1/jquery.fileupload.css"
      rel="stylesheet" media="screen" />
</head>

I have added them in the pom file:

<dependency>
    <groupId>org.webjars.npm</groupId>
    <artifactId>jquery</artifactId>
    <version>2.1.4</version>
</dependency>
<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>bootstrap</artifactId>
    <version>3.3.5</version>
</dependency>

<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>jquery-file-upload</artifactId>
    <version>9.10.1</version>
</dependency>

But when calling the page I got a 404 on jquery.min.js and jquery.fileupload.min.js.

GET http://localhost:8888/webjars/jquery-file-upload/9.10.1/jquery.fileupload.min.js 
2015-09-21 02:02:04.059 home:9 
GET http://localhost:8888/webjars/jquery/2.1.4/jquery.min.js 404 (Not Found)
like image 709
Master Mind Avatar asked Sep 21 '15 00:09

Master Mind


5 Answers

You are referencing jquery library correctly. Maybe you are missing resource handler configuration.

<mvc:resources mapping="/webjars/**" location="classpath:/META-INF/resources/webjars/"/>

Or if you use JavaConfig

@Configuration
public class WebConfig extends WebMvcConfigurerAdapter {

  @Override
  public void addResourceHandlers(ResourceHandlerRegistry registry) {
    registry.addResourceHandler("/webjars/**").addResourceLocations("classpath:/META-INF/resources/webjars/");
  }

}

Webjars documentation

If this will not work, please check if you have webjars on classpath (open your application JAR in 7Zip and check if webjars resources are inside it.)

like image 145
Gondy Avatar answered Nov 13 '22 06:11

Gondy


Additional answer found on one blog:

When using Spring Framework version 4.2 or higher, it will automatically detect the webjars-locator library on the classpath and use it to automatically resolve the version of any WebJars assets.

In order to enable this feature, we’ll add the webjars-locator library as a dependency of the application:

<dependency>
    <groupId>org.webjars</groupId>
    <artifactId>webjars-locator</artifactId>
    <version>0.30</version>
</dependency>

In this case, we can reference the WebJars assets without using the version; (...)

like image 45
Tomasz Przybylski Avatar answered Nov 13 '22 05:11

Tomasz Przybylski


if you use servlet 3.x just add :

1- using java config :

@Configuration
@EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {

    public void addResourceHandlers(ResourceHandlerRegistry registry) {

            registry.addResourceHandler("/webjars/**").addResourceLocations("/webjars/").resourceChain(false);

       registry.setOrder(1);
    }


}

2- or xml config :

<mvc:resources mapping="/webjars/**" location="/webjars/"> 
  <mvc:resource-chain resource-cache="false" /> 
</mvc:resources>
like image 33
YaaKouB Avatar answered Nov 13 '22 05:11

YaaKouB


After inspecting the webjar for jquery, I got this working by adding a "dist" subpath.

<script src="webjars/jquery/2.1.4/dist/jquery.min.js" type="text/javascript"></script>
like image 4
Markus Schaffner Avatar answered Nov 13 '22 05:11

Markus Schaffner


The webjars dependencies should be available on the spring boot classpath, so you should try referencing the webjars using the src attribute like so:

<script src="webjars/jquery/2.1.4/jquery.min.js" type="text/javascript"></script>
<script src="webjars/jquery-file-upload/9.10.1/jquery.fileupload.min.js"></script>
<link href="webjars/bootstrap/3.3.5/css/bootstrap.min.css"
  rel="stylesheet" media="screen" />
<link href="webjars/jquery-file-upload/9.10.1/jquery.fileupload.css"
  rel="stylesheet" media="screen" />
like image 1
marminto Avatar answered Nov 13 '22 06:11

marminto