JSFiddle - React, Tailwind, and code Playground

HTML

<a href="javascript:void(0);" data-icol="[1]" class="fields" id="name">Show Name</a>

<a href="javascript:void(0);" data-icol="[2]" class="fields" id="address">Show Address</a>

<a href="javascript:void(0);" data-icol="[3]" class="fields" id="company">Show Company</a>

JavaScript

$(function () {
    $('.fields').click(fnShowHide);
});
var showregex = /^Show/i;
var hideregex = /^Hide/i;

function fnShowHide() {

    var iCol = $(this).data('icol'); //will give [1]
    console.log(iCol);
    //Your code
    $(this).text(function (_, text) { //now this refers to the element clicked
        return showregex.test(text) ? text.replace(showregex, 'Hide') : text.replace(hideregex, 'Show');

    });
}