DOM Observer API

spy.has()

async

Validates whether the components identified by the passed names are actively observing, or whether the matched DOM elements are being observed.

  • Accepts arguments as strings and arrays of strings.
    You can pass component names as individual arguments, as an array, or as a string separated by commas or spaces.
    Each value is seen as a new argument.
  • Returns true if all components identified by the passed names are actively observing or if all the matched DOM elements are being observed, otherwise, returns false.
Example: 
await spy.has('component_1');
// true

await spy.has('component_3');
// false

await spy.has('component_1', 'component_2');
await spy.has(['component_1', 'component_2']);
await spy.has('component_1, component_2');
await spy.has('component_1 component_2');
// true

await spy.has('component_1', 'component_3');
// false

await $('div').spy.has();
// true

await $('div ?').spy.has();
// true

await $('span').spy.has();
// false

await $('div, span ?').spy.has();
// false
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