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JSFiddle - React, Tailwind, and code Playground

JavaScript

function compareDates(obj, fecha){
    var date1 = new Date( Date.parse(obj.value.replace(/-/g, " ")) );   
    var date2 = new Date( Date.parse(fecha.value.replace(/-/g, " ")) );

    if(date1 < date2){
        alert("Invalid Date");
    }
}

compareDates({value: '10-JUL-2013'}, {value: '20-JUL-2013'})

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JSFiddle - React, Tailwind, and code Playground

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