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var href = "/Controller/Action?id=11112&value=4444";
href = href.replace(/\?.*/,'');
href ; //# => /Controller/Action

var startStr = longString.substring(0, 10);
var endStr = longString.slice(-8);
var truncateStr = startStr+" ... "+endStr;

//eyJ0eXAiOi ... cdmKmClg