Javascript - 如何截断字符串并在末尾添加三个点

Question

I have a js string and I wanted to truncate it after 43 char and add three dots (...) at end. Three dots can be em dash.

Now the problem is if there was a whitespace at the end with truncated string I wanted to disallow it. Like, the funcation will skipp whitespace at the end while char count and add three dots.

getTruncatedName = (source) => {
         let skippedString = source.trimEnd();
         if(skippedString.length > 43){
             return skippedString.substring(0, 43) + '...';
         }else{
             return source;
         }
     }

Diamond and Mother-of-pearl Circle Pendant in gold plate

Output:

Diamond and Mother-of-pearl Circle Pendant ...

I want:

Diamond and Mother-of-pearl Circle Pendant...

If i count before... its 42 but i want 43

Answer 1

Does it always put a space there? Or could it be that there is a space at the 43th position and thus that is part of the string and included.

So maybe try re-trimming again. Like such

return skippedString.substring(0, 43).trimEnd() + '...';