1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/**
* @fileoverview Rule to enforce spacing around embedded expressions of template strings
* @author Toru Nagashima
*/
"use strict";
//------------------------------------------------------------------------------
// Requirements
//------------------------------------------------------------------------------
const astUtils = require("./utils/ast-utils");
//------------------------------------------------------------------------------
// Helpers
//------------------------------------------------------------------------------
const OPEN_PAREN = /\$\{$/u;
const CLOSE_PAREN = /^\}/u;
//------------------------------------------------------------------------------
// Rule Definition
//------------------------------------------------------------------------------
module.exports = {
meta: {
type: "layout",
docs: {
description: "require or disallow spacing around embedded expressions of template strings",
category: "ECMAScript 6",
recommended: false,
url: "https://eslint.org/docs/rules/template-curly-spacing"
},
fixable: "whitespace",
schema: [
{ enum: ["always", "never"] }
],
messages: {
expectedBefore: "Expected space(s) before '}'.",
expectedAfter: "Expected space(s) after '${'.",
unexpectedBefore: "Unexpected space(s) before '}'.",
unexpectedAfter: "Unexpected space(s) after '${'."
}
},
create(context) {
const sourceCode = context.getSourceCode();
const always = context.options[0] === "always";
const prefix = always ? "expected" : "unexpected";
/**
* Checks spacing before `}` of a given token.
* @param {Token} token A token to check. This is a Template token.
* @returns {void}
*/
function checkSpacingBefore(token) {
const prevToken = sourceCode.getTokenBefore(token);
if (prevToken &&
CLOSE_PAREN.test(token.value) &&
astUtils.isTokenOnSameLine(prevToken, token) &&
sourceCode.isSpaceBetweenTokens(prevToken, token) !== always
) {
context.report({
loc: token.loc.start,
messageId: `${prefix}Before`,
fix(fixer) {
if (always) {
return fixer.insertTextBefore(token, " ");
}
return fixer.removeRange([
prevToken.range[1],
token.range[0]
]);
}
});
}
}
/**
* Checks spacing after `${` of a given token.
* @param {Token} token A token to check. This is a Template token.
* @returns {void}
*/
function checkSpacingAfter(token) {
const nextToken = sourceCode.getTokenAfter(token);
if (nextToken &&
OPEN_PAREN.test(token.value) &&
astUtils.isTokenOnSameLine(token, nextToken) &&
sourceCode.isSpaceBetweenTokens(token, nextToken) !== always
) {
context.report({
loc: {
line: token.loc.end.line,
column: token.loc.end.column - 2
},
messageId: `${prefix}After`,
fix(fixer) {
if (always) {
return fixer.insertTextAfter(token, " ");
}
return fixer.removeRange([
token.range[1],
nextToken.range[0]
]);
}
});
}
}
return {
TemplateElement(node) {
const token = sourceCode.getFirstToken(node);
checkSpacingBefore(token);
checkSpacingAfter(token);
}
};
}
};
|
