javascript simulate keypress

let event = new KeyboardEvent("type", {
  bubbles: true,
  cancelable: true,
  charCode: 0,
  keyCode: 0,
  key: "",
  shiftKey: false,
  altKey: false,
  ctrlKey: false,
  metaKey: false,
  repeat: false,
  location: KeyboardEvent.DOM_KEY_LOCATION_STANDARD,
});
// Select the element to target
let inputElement = document.getElementById("myInput");
// Create and dispatch the event
inputElement.dispatchEvent(event);
let enterEvent = new KeyboardEvent("keydown", {
  key: "Enter",
  keyCode: 13,
  which: 13
});

inputElement.dispatchEvent(enterEvent);describe('keypress simulation', () => {
  it('triggers the expected function', () => {
    // Setup your DOM, event listeners, and simulate the event
    inputElement.dispatchEvent(enterEvent);
    // Assertions to verify the event caused the expected outcome
  });
});// Example for React
class MyComponent extends React.Component {
  simulateKeyPress = () => {
    // Create a synthetic event
    const event = new KeyboardEvent('keydown', { key: 'Enter' });
    // React's way to dispatch
    this.inputRef.dispatchEvent(event);
  };

  render() {
    return <input ref={(input) => this.inputRef = input} />;
  }
}async function simulateTyping(element, text, delay) {
  for (const char of text) {
    const event = new KeyboardEvent('keydown', { key: char });
    element.dispatchEvent(event);
    await new Promise(resolve => setTimeout(resolve, delay));
  }
}let ctrlCEvent = new KeyboardEvent('keydown', {
  key: 'c',
  ctrlKey: true
});

element.dispatchEvent(ctrlCEvent);// Type a character
function typeChar(c) {
  document.dispatchEvent(
    new KeyboardEvent('keydown', {
      keyCode: c.charCodeAt(0),
      which: c.charCodeAt(0),
      key: c
    })
  );
}

// Type a string
function type(w) {
  for (let c of w) {
    typeChar(c);
  }
}

type('hello world');window.addEventListener('keydown', (e) => {
  console.log(e)
})

window.dispatchEvent(new KeyboardEvent('keydown', {
  'key': 'a'
}));
//use --> document.addEventListener('keypress', (event)=>{console.log(event)}) <-- copy the output of the key you want
//and place it (as object) at ...ardEvent('keydown', HERE)...when a key is pressed a key event is dispatched, you need to create the 
key event and use dispatchEvent() to dispatch the event. example:

To simulate press enter:
let element = getElementBy#("element#");
element[0].dispatchEvent(new KeyboardEvent('keydown', {bubbles:true, key:'Enter', code:"Enter", charCode:0, keyCode:13, which:13 }));
element[0].dispatchEvent(new KeyboardEvent('keypress', {bubbles:true, key:'Enter', code:"Enter", charCode:13, keyCode:13, which:13 }));
element[0].dispatchEvent(new KeyboardEvent('keyup', {bubbles:true, key:'Enter', code:"Enter", charCode:0, keyCode:13, which:13 }));

Works on any other keys, just change the key code and charcode.
Keydown, press, and up is included to be sure.
Javascript相关代码片段
