'data:post-snippet' truncation in blogger - html

Question

Let's say I wrote a post like this on Blogger:
abc def ghi <div class="pls-exclude-from-snippet">jkl mno pqr stu vwxyz</div>
Instead of listing from a to z, I want Blogger to set its data:post.snippet to 'abc def ghi' only (letting Blogger know to stop if it reads the token: a div with class 'pls-exclude-from-snippet'). How do I do that?

Answer 1

I found help here https://productforums.google.com/forum/#!topic/blogger/X9LxrjXnb2s
Still have to tweak it a little, but it works. Think gonna post it to help people with similar problem as I had.
Here's my code. Before </head>, add:
<script type='text/javascript'>
//<![CDATA[
function stopIfFound(strx,token){
var theLocation = strx.indexOf(token);
if(theLocation!=-1){
strx = strx.substr(0,theLocation);
}
return strx;
}
function removeHtmlTag(strx, chop){
strx = stopIfFound(strx,'<div class="pls-exclude-from-snippet">');
if(strx.indexOf("<")!=-1){
var snippet = strx.split("<");
for(var i=0;i<snippet.length;i++){
if(snippet[i].indexOf(">")!=-1){
snippet[i] = snippet[i].substring(snippet[i].indexOf(">")+1,snippet[i].length);
}
}
strx = snippet.join("");
}
chop = (chop < strx.length-1) ? chop : strx.length-2;
while(strx.charAt(chop-1)!=' ' && strx.indexOf(' ',chop)!=-1) chop++;
strx = strx.substring(0,chop-1);
return strx+'...';
}
function createSnippet(pID){
var div = document.getElementById(pID);
var summ = snippet_count;
var summary = '<div class="snippets">' + removeHtmlTag(div.innerHTML,summ) + '</div>';
div.innerHTML = summary;
}
//]]>
</script>
Find <data:post.snippet/>, in
<div class='post-body'>
<b:if cond='data:post.snippet'>
<data:post.snippet/>
</b:if>
</div>
replace it with
<div expr:id='"summary" + data:post.id'><data:post.body/></div>
<script type='text/javascript'>createSnippet("summary<data:post.id/>");
</script>

Answer 2

You can try to limit the length of the characters.
Use this syntax:
<b:eval expr='snippet(data:post.body, {length: 150})' />
150 is the length. You can change it to any numbers you want.
Check my personal blog change snippet length on Blogger without Javascript to see more example.