Question

Can someone help what’s the javascript equivalent of below jquery line.

$("#abc option[value='1']").text();

abc is the id of selectbox

Answer 1

var options = document.getElementById("abc").options;
for (var i = 0, j = options.length; i < j; i++) {
    if (options[i].value == "1") {
        alert(options[i].text);
    }
}

The value and text attributes are available on the HTMLOptionElement per DOM Level 2.

(demo)

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UPDATE
Updated demo with combined text, cf. comments:

var options = document.getElementById("abc").options,
    text = "";

for (var i = 0, j = options.length; i < j; i++) {
    if (options[i].value == "1") {
        text += options[i].text;
    }
}