getElementByTagName Not defined error

[goswamikailash]

let fin = getElementByTagName(message, 'fin', Strophe.Strophe.NS.MAM);

Getting Error getElementByTagName not defined.

[jcbrand]

getElementByTagName doesn't exist. There's only getElementsByTagName, note the s.

[sualko]

@goswamikailash how is this related to the rsm plugin?

[goswamikailash]

As per written in Usage

var fin = getElementByTagName(message, 'fin', Strophe.NS.MAM);
var result = getElementByTagName(message, 'result', Strophe.NS.MAM);

getElementByTagName with three argument. There is no method like this.