htmx/test/core/extensions.js

describe('Core htmx extension tests', function() {
  beforeEach(function() {
    this.server = makeServer()
    clearWorkArea()
  })
  afterEach(function() {
    this.server.restore()
    clearWorkArea()
  })

  it('should support event cancellation by returning false', function() {
    htmx.defineExtension('ext-prevent-request', {
      onEvent: function(name, evt) {
        if (name === 'htmx:beforeRequest') {
          return false
        }
      }
    })

    this.server.respondWith('GET', '/test', 'clicked!')
    var div = make('<div hx-get="/test" hx-ext="ext-prevent-request">Click Me!</div>')
    div.click()
    this.server.respond()
    div.innerHTML.should.equal('Click Me!')
  })

  it('should support event cancellation with preventDefault', function() {
    htmx.defineExtension('ext-prevent-request', {
      onEvent: function(name, evt) {
        if (name === 'htmx:beforeRequest') {
          evt.preventDefault()
        }
      }
    })

    this.server.respondWith('GET', '/test', 'clicked!')
    var div = make('<div hx-get="/test" hx-ext="ext-prevent-request">Click Me!</div>')
    div.click()
    this.server.respond()
    div.innerHTML.should.equal('Click Me!')
  })
})