@markdown-viewer/text-measure

Text measurement utilities for browser and fibjs environments.

Provides a pluggable TextMeasureProvider interface for measuring text dimensions (width, height, line count) across different runtimes — DOM in the browser, headless WebView in fibjs.

Installation

npm install @markdown-viewer/text-measure

Usage

Basic measurement

In fibjs, the WebView-based text measurement provider is automatically configured on import — no manual setup needed.

import { measureText } from '@markdown-viewer/text-measure';

const { width, height } = measureText('Hello World', 14, 'Arial');

Layout measurement

Measure text with wrapping and line information:

import { measureTextLayout } from '@markdown-viewer/text-measure';

const layout = measureTextLayout('Long text...', 14, 'Arial', 'normal', 'normal', 200);
// => { width, height, lineCount, lineHeight }

API

Measurement functions

Function	Description
measureText(text, fontSize, fontFamily, ...)	Measure text dimensions
measureMultilineText(text, fontSize, fontFamily, ...)	Measure multi-line text
measureTextLayout(text, fontSize, fontFamily, ..., containerWidth)	Measure with wrapping/layout info
isBrowserMeasurementAvailable()	Check if DOM measurement is available

Constants

Export	Description
DEFAULT_FONT_FAMILY	Default font family ('Arial, Helvetica, sans-serif')
setDefaultFontFamily(family)	Override the default font family

Types

• TextLayoutResult — { width, height, lineCount, lineHeight }

License

MIT