AstText (EN)

• Introduction
• Properties
  • type
  • data
  • length
• Methods
  • lint
  • replaceData
  • cloneNode
  • appendData
  • deleteData
  • insertData
  • substringData
  • splitText

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• 简体中文

Introduction

Text nodes that inherit the properties and methods of AstNode. Modeled after the Text class, the properties and methods are also very similar to the Text class.

✅ Available in the Mini and Browser versions.

Properties

type

✅ Expand

type: 'text'
Read-only. The text node type is always 'text'. Conversely, type: 'text' must correspond to a text node.

// type
var {firstChild} = Parser.parse('a');
assert.strictEqual(firstChild.type, 'text');

data

✅ Expand

type: string
The text content of the node, read-only.

// data
var {firstChild} = Parser.parse('a');
assert.strictEqual(firstChild.data, 'a');

length

Expand

type: number
The length of the text content, read-only.

// length
var {firstChild} = Parser.parse('a');
assert.strictEqual(firstChild.length, 1);

Methods

lint

✅ Expand

returns: LintError[]

Report potential grammar errors.

// lint
var {firstChild} = Parser.parse('{{[[<div');
assert.equal(firstChild, '{{[[<div');
assert.deepStrictEqual(firstChild.lint(), [
	{
		severity: 'error',
		message: 'lonely "{"',
		startLine: 0,
		startCol: 0,
		startIndex: 0,
		endLine: 0,
		endCol: 2,
		endIndex: 2,
		excerpt: '{{[[<div',
	},
	{
		severity: 'error',
		message: 'lonely "["',
		startLine: 0,
		startCol: 2,
		startIndex: 2,
		endLine: 0,
		endCol: 4,
		endIndex: 4,
		excerpt: '{[[<div',
	},
	{
		severity: 'warning',
		message: 'lonely "<"',
		startLine: 0,
		startCol: 4,
		startIndex: 4,
		endLine: 0,
		endCol: 8,
		endIndex: 8,
		excerpt: '[<div',
	},
])

replaceData

✅ Expand

param: string String to replace
Replace the string.

// replaceData
var {firstChild} = Parser.parse('a');
firstChild.replaceData('b');
assert.equal(firstChild, 'b');

cloneNode

Expand

returns: this
Clone the node.

// cloneNode
var {firstChild} = Parser.parse('a');
assert.deepStrictEqual(firstChild.cloneNode(), firstChild);

appendData

Expand

param: string String to append
Append the string to the end.

// appendData
var {firstChild} = Parser.parse('a');
firstChild.appendData('b');
assert.equal(firstChild, 'ab');

deleteData

Expand

param: number Starting position
param: number Number of characters to delete
Delete part of the string.

// deleteData
var {firstChild} = Parser.parse('abc');
firstChild.deleteData(1, 1);
assert.equal(firstChild, 'ac');

insertData

Expand

param: number Position to insert
param: string String to insert
Insert a string.

// insertData
var {firstChild} = Parser.parse('ab');
firstChild.insertData(1, 'c');
assert.equal(firstChild, 'acb');

substringData

Expand

param: number Starting position
param: number Number of characters to extract
returns: string
Extract a substring.

// substringData
var {firstChild} = Parser.parse('abc');
assert.strictEqual(firstChild.substringData(1, 1), 'b');

splitText

Expand

param: number Position to split
Split the text node into two parts.

// splitText
var {firstChild} = Parser.parse('ab');
firstChild.splitText(1);
assert.equal(firstChild, 'a');
assert.equal(firstChild.nextSibling, 'b');