const regex = /<span[^>]*>.*?<\/span>/gm;
// Alternative syntax using RegExp constructor
// const regex = new RegExp('<span[^>]*>.*?<\\\/span>', 'gm')
const str = `<p>Qualifiers are used to adjust qualities of an object or a variable.</p>
<p>There are two types of qualifiers in C++. CV <span style="color: #3665f3;"><strong>Qualifiers</strong></span> and Storage Duration <span style="color: #3665f3;"><strong>Qualifiers</strong></span>. CV stands for constant and volatile.</p>
<p>CV <span style="color: #3665f3;"><strong>Qualifiers</strong></span></p>
<ul>
<li>const - marks a variable as read-only or immutable.</li>
<li>mutable - is used on data members to make them writable from a const qualified member function.</li>
<li>volatile - mark a variable that may be changed by another process. This is partly deprecated in C++ 20.</li>
</ul>
<p>Storage Duration Qualifiers are used to define the duration or lifetime of a variable. By default, a variable defined within a block has an automatic lifetime.</p>
<p>Storage Duration <span style="color: #3665f3;"><strong>Qualifiers</strong></span></p>
<ul>
<li>static - variables defined to have life <span>beyond</span> the execution of a block. Static variables live for the duration of the program. Commonly used for keeping state between usages between a given function or a method. By default a variable defined outside of any block is static.</li>
<li>register - are variables stored in processor registers. This can make them faster <span style="color: #3665f3;"><strong>Qualifiers</strong></span> and more efficient. This qualifier is taken by the compiler as a suggestion. The compiler may or may not store the variable in a register.</li>
<li>extern variables are defined in a separate translation unit. These are linked with your code with the linker step of the compilation process.</li>
</ul>`;
// Reset `lastIndex` if this regex is defined globally
// regex.lastIndex = 0;
let m;
while ((m = regex.exec(str)) !== null) {
// This is necessary to avoid infinite loops with zero-width matches
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
// The result can be accessed through the `m`-variable.
m.forEach((match, groupIndex) => {
console.log(`Found match, group ${groupIndex}: ${match}`);
});
}
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 JavaScript, please visit: https://developer.mozilla.org/en/docs/Web/JavaScript/Guide/Regular_Expressions