Function textMetrics

Returns a object that contains information about the measured text (such as its width, for example)

Example

const { textMetrics, TextLayer } = require('@hitomihiumi/lazy-canvas')
//...
let text = new TextLayer()
.setText(`Hello, World!`)

console.log(textMetrics(text))
// returns {
//      width: 70,
//      actualBoundingBoxLeft: 0,
//      actualBoundingBoxRight: 71,
//      actualBoundingBoxAscent: 9,
//      actualBoundingBoxDescent: 2,
//      emHeightAscent: 11,
//      emHeightDescent: 3,
//      alphabeticBaseline: -1
//  }
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