Use js + regular expressions to add links to keywords _ javascript tips-js tutorial

This article mainly introduces how to use js + regular expressions to add links to keywords. It is very simple. If you need them, you can refer to the following link to add the disease names in an html Script to the disease database, add only once. Avoid hyperlinks or image links.

Str. replace ('diabetes ', 'diabetes') was initially used ');

After searching for the results for half a day, the effect of replacement was not found. It turned out that there was an image title containing diabetes, and it was first posted.

Therefore, we need to avoid links and tags,

Do not avoid other labels

:

The Code is as follows:

S = "first look at a diabetic medical record
"+
"Dr. Wang
"+
"Diabetes Overview
Diabetes incidence
Diabetic symptoms
"+
"";
Document. write (s );

A_reg = // I; // The regular expression of the link
Img_reg = // I; // The regular expression of the image link to prevent incorrect replacement of the title and alt attributes of the image, including the disease name.
Var ix = 0;

Var arr_ele = [];
// Replace all the two types of labels with {index}, process the remaining text, and then replace the label content.
While (true ){
If (-1 = s. toLowerCase (). indexOf ('break;
}
A_match = s. match (a_reg );
If (a_match ){
// Console. log (a_match );
Arr_ele.push (a_match [0]);
S = s. replace (a_reg, '{{' + ix + '}}');
Ix ++;
}
Img_match = s. match (img_reg );
If (img_match ){
// Console. log (img_match );
Arr_ele.push (img_match [0]);
S = s. replace (img_reg, '{{' + ix + '}}');
Ix ++;
}
Console. log (s );
}

Document. write ('
-------------------------
Step 2: replace the link with {index:
'+ S +'
');

S = s. replace (/diabetes/I, "Diabetes ");

Document. write ('
-------------------------
Step 2: add the link to the disease database:
'+ S +'
');

If (arr_ele ){
For (var I = 0; I s = s. replace ('{' + I + '}', arr_ele [I]);
}
}

Document. write ('
-------------------------
Step 2: replace the link with the following:
'+ S +'
');

The above is all the code that uses js + regular expressions to add links to keywords. For more information, see