Use Of Polymer Core Selector Element

Polymer provides core-selector element for element selection.In this Demo, "We will learn the use of core selector element".In the demo we have maintained a list of student detail in JSON. When user click on any student it is selected and color changes to RED/GREEN base on the mark.If the student score is more then 30 it becomes GREEN and PASS string is get attached in the right side.If the student score is less then 30 it becomes RED and FAIL string is get attached in the right side.on-core-...