Simulate typing into DOM elements. This can be used anywhere you need to simulate user keystrokes, but is particularly useful in testing environments.
# Install via yarn.$ yarn add [--dev] keysim# Install via npm.$ npm install [--save-dev] keysim# Install by copying the dist file.$ curl -o path/to/vendor/keysim.js https://unpkg.com/keysim@latest/dist/keysim.js
There are two high-level methods for simulating keystrokes on a DOM element, one for typing input into an element and one for typing non-input "action" keystrokes. Note that none of the methods provided by keysim will trigger the browser's default behavior, such as inserting text or moving the cursor. It only allows you to test your event handling code by sending the correct DOM events.
Get a standard keyboard and use it to fire events onto a DOM element:
let input = document;let keyboard = KeysimKeyboardUS_ENGLISH;keyboard;
This will fire events
for each typed character in the input string. In addition, some characters
may require modifier keys in order to type. The
will be fired for these modifier keys (e.g. the SHIFT key) as appropriate.
Triggering Special Actions
It is also sometimes useful to simulate special keys, or actions that do not cause input. For example, here's how to simulate backward deleting a word and selecting all text in the input:
let input = document;let keyboard = KeysimKeyboardUS_ENGLISH;keyboard;keyboard;
Raw Keystroke Dispatch
If you need to dispatch events for an exact sequence of keystrokes you may use
Keyboard#dispatchEventsForKeystroke, which is used by both
let input = document;let keyboard = KeysimKeyboardUS_ENGLISH;let ctrl_shift_enter =KeysimKeystrokeCTRL | KeysimKeystrokeSHIFT13;keyboard;
1 Here is the complete set of events fired (as reported by this page):
keydown keyCode=72 (H) which=72 (H) charCode=0 keypress keyCode=104 (h) which=104 (h) charCode=104 (h) textInput data=h keyup keyCode=72 (H) which=72 (H) charCode=0 keydown keyCode=69 (E) which=69 (E) charCode=0 keypress keyCode=101 (e) which=101 (e) charCode=101 (e) textInput data=e keyup keyCode=69 (E) which=69 (E) charCode=0 keydown keyCode=76 (L) which=76 (L) charCode=0 keypress keyCode=108 (l) which=108 (l) charCode=108 (l) textInput data=l keyup keyCode=76 (L) which=76 (L) charCode=0 keydown keyCode=76 (L) which=76 (L) charCode=0 keypress keyCode=108 (l) which=108 (l) charCode=108 (l) textInput data=l keyup keyCode=76 (L) which=76 (L) charCode=0 keydown keyCode=79 (O) which=79 (O) charCode=0 keypress keyCode=111 (o) which=111 (o) charCode=111 (o) textInput data=o keyup keyCode=79 (O) which=79 (O) charCode=0 keydown keyCode=16 which=16 charCode=0 keydown keyCode=49 (1) which=49 (1) charCode=0 keypress keyCode=33 (!) which=33 (!) charCode=33 (!) textInput data=! keyup keyCode=49 (1) which=49 (1) charCode=0 keyup keyCode=16 which=16 charCode=0 keydown keyCode=91 ([) which=91 ([) charCode=0
Ensure that the keysim dependencies are installed (
yarn install). Then run
yarn build to re-create
To run the tests in Chrome, run
yarn test:browser. To run the tests in node,
yarn test:node. Running
yarn test will run both.
Fork the project, create a branch, and fix your bug or add your feature on that branch. Be sure to add tests for your bug fix or feature.