Using Regex in Javascript to locate unfinished items that start and finish with brackets

Question

Using Regex in Javascript to locate unfinished items that start and finish with brackets

Can anyone assist me in utilizing regex to identify any incomplete items that start with {{.

I have attempted to search for instances in the string that begin with {{ and are followed by letters (a-Z) but do not end with }}. However, my attempts always result in null.

string = 'Hello {{name}}, you are {{a';
console.log(string.match(/^({{)?[a-z]:[A-Z]$/g));

The desired outcome would be {{a in this scenario since {{name}} is complete. Any assistance offered would be highly appreciated.

The only things allowed within it are . eg: {{name.forename}} {{name.lastname}}

javascript regex

Answer 1

Answer №1

Utilize the "ultimate regex trick" in this scenario to capture all word character chunks enclosed in double curly braces or capture any instance of and retain a {{ followed by zero or more word characters:

Array.from(text.matchAll(/{{\w+(?:\.\w+)*}}|({{(?:\w+(?:\.\w+)*)?)/g), x => x[1]).filter(Boolean)

Explanation:

{{\w+(?:\.\w+)*}} - {{, one or more word characters, optional periods followed by one or more word characters, }}
| - alternatively
({{(?:\w+(?:\.\w+)*)?) - Group 1: {{ and possibly one or more word characters with potential period sequences and additional word characters.

Answer 2

Utilize the "ultimate regex trick" in this scenario to capture all word character chunks enclosed in double curly braces or capture any instance of and retain a {{ followed by zero or more word characters:

Array.from(text.matchAll(/{{\w+(?:\.\w+)*}}|({{(?:\w+(?:\.\w+)*)?)/g), x => x[1]).filter(Boolean)

Explanation:

{{\w+(?:\.\w+)*}} - {{, one or more word characters, optional periods followed by one or more word characters, }}
| - alternatively
({{(?:\w+(?:\.\w+)*)?) - Group 1: {{ and possibly one or more word characters with potential period sequences and additional word characters.

Using Regex in Javascript to locate unfinished items that start and finish with brackets

Answer №1

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