import Foundation
let pattern = #"(<[^>]*)(\[\s*@?[-_a-zA-Z0-9.$]*%?\s*])(=)(["'])"#
let regex = try! NSRegularExpression(pattern: pattern, options: .anchorsMatchLines)
let testString = #"""
<div [ ngStyle ]="{'max-width.px': i * 2 + 5}"></div>
<div [ngClass]="[
'class-one',
'class-two',
'class-three'
]"></div>
<div [style.right.%]="val"></div>
<div [@animation.trigger]="val"></div>
<img [attr.aria-label]="val" />
<div [my-property]="val"></div>
<div [my_property]="val"></div>
<div [myProperty$]="val"></div>
/// BELOW SHOULD RETURN NO MATCH
<div [%invalidProperty]="val"></div>
<div [invalidProperty)="val"></div>
<div>[my-property]="val"</div>
<div>
[my-property]="val"
</div>
"""#
let stringRange = NSRange(location: 0, length: testString.utf16.count)
let matches = regex.matches(in: testString, range: stringRange)
var result: [[String]] = []
for match in matches {
var groups: [String] = []
for rangeIndex in 1 ..< match.numberOfRanges {
let nsRange = match.range(at: rangeIndex)
guard !NSEqualRanges(nsRange, NSMakeRange(NSNotFound, 0)) else { continue }
let string = (testString as NSString).substring(with: nsRange)
groups.append(string)
}
if !groups.isEmpty {
result.append(groups)
}
}
print(result)
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Swift 5.2, please visit: https://developer.apple.com/documentation/foundation/nsregularexpression