gpDA

// TableUI.js

return(
      <React.Fragment>
        <Table>
          <thead>
            <tr>
              <th onClick={() => handleSortClick("studentId")}>
                <strong>
                  studentId

gpDA

// store/modules/base.js

// initial state
const initialState = Map({
  mainData: List([
    {
      studentId: "1",
      studentName: "Jim",
      studentAge: 0,
      studentZipCode: "N/A"

gpDA

      const compareBy = key => {
        return function(a, b) {
          if (sortToggle) {
            if (a[key] == null || a[key] == 0 || a[key] == "N/A") return 1;
            if (b[key] == null || b[key] == 0 || b[key] == "N/A") return -1;
            if (a[key] < b[key]) return -1;
            if (a[key] > b[key]) return 1;
            return 0;
          } else {
            // descneding

gpDA

function Car(model, year, miles) {
  
  this.model = model;
  this.year= year;
  this.miles = miles;
  
  this.toString = function () {
     return this.model + " has done " + this.miles + " miles";
  };
}

gpDA

function Car(model, year, miles) {
  
  this.model = model;
  this.year = year;
  this.miles = miles;
}

// Note here that we are using Object.prototype.newmethod rather than
// Object.prototype so as to avoid redefining the prototype object
Car.prototype.toString = function () {

gpDA

elem.addEventListener(..., {capture: true})
// or, just "true" is an alias to {capture: true}
elem.addEventListener(..., true)

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<div id="div1">I am a div1</div>

<script>
const div1 = document.getElementById("div1");

div1.addEventListener("click", function() {
  console.log("div1 clicked");
});
</script>

gpDA

<div id="div1">
  <div id="div2">I am a div1</div>
</div>

<script>
  const div1 = document.getElementById("div1");

  div1.addEventListener("click", function() {
    console.log("div1 clicked");
  });

gpDA

function handleClick(event) {
	event.stopPropagation();

	// do something
}

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const body = document.getElementsByTagName('body')[0];

function callback() {
  console.log('Hello');
}

body.addEventListener('click', callback);