Spring boot webjars: unable to load javascript library through webjar

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>

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.)

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>

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; (...)