Manifest

You must declare the "input" permission in the extension manifest to use the input.ime API. For example:

{
  "name": "My extension",
  ...
  "permissions": [
    "input"
  ],
  ...
}

Examples

The following code creates an IME that converts typed letters to upper case.

var context_id = -1;

chrome.input.ime.onFocus.addListener(function(context) {
  context_id = context.contextID;
});

chrome.input.ime.onKeyEventAsync.addListener(
  function(engineID, keyData) {
    if (keyData.type == "keydown" && keyData.key.match(/^[a-z]$/)) {
      chrome.input.ime.commitText({"contextID": context_id,
                                   "text": keyData.key.toUpperCase()});
      return true;
    } else {
      return false;
    }
  });

For an example of using this API, see the basic input.ime sample. For other examples and for help in viewing the source code, see Samples.