I want to escape custom tags except for HTML tags such as strong, bold, italic.
Input: "Hello World! <notification>Name</notification><nat>Nat tag</nat> <strong>This should be strong</strong><nas>Nas Tag</nas>"
Output: Hello World! <notification>Name</notification> <nat>Nat tag</nat>**This should be strong**<nas> Nas Tag</nas>
string.replace(/</g, "<").replace(/>/g, ">")
.replace(/"/g, """).replace(/'/g, "'")
.replace(/<(?!/?strong>)[^>]+>/g, '')
I tried with the above replace but it is also replacing <strong> with < strong >
any help would be appreciated.
Better to have a whitelist of allowed tags and "escape" anything that isn't in the list. Something like this will work for a simple implementation, but in general, regex is not a good tool for parsing HTML.
var input = "Hello World! <notification asdfasd=asd>Name</notification><nat>Nat tag</nat> <strong>This should be strong</strong><nas>Nas Tag</nas>"
var output = escapeCustomTags(input, ['strong'])
console.log(output);
function escapeCustomTags(input, allowed_tags = []) {
// Make allowed tags array lower case
allowed_tags = allowed_tags.map(c => c.toLowerCase());
// Output is the input, edited
var output = input;
// Attempt to match an opening or closing HTML tag
var reg = /<\/?([a-zA_Z0-9]*)[^>]*?>/g;
// An array that will contain all disallowed tags
var disallowed_tags = [];
// For each tag in the input, if it's allowed, skip
// Else, add it to the array.
var match;
while ((match = reg.exec(input)) !== null) {
if (allowed_tags.includes(match[1].toLowerCase())) continue;
disallowed_tags.push(match[0]);
}
// Replace each disallowed tag with the "escaped" version
disallowed_tags.forEach(tag => {
var find = tag;
var replace = tag.replace('<', '<').replace('>', '>');
output = output.replace(find, replace)
});
return output;
}