An error is reported in the browser console: UncaughtSyntaxError invalid or unexpected token (xxx.js)

1. Report an error in the browser console: UncaughtSyntaxError: Invalid or Unexpected token (XXX.js). as shown in Figure 1

Figure 1

2. The last discovery is that the content of the JS file in the response contains \, and the content is escaped. as shown in Figure 2

Figure 2

3. After the \ is removed from the content of the response js file, the content is no longer escaped. The console no longer reports errors.