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check if the new one and the last one are operators, if they are, the… #12

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check if the new one and the last one are operators, if they are, the… #12

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16 changes: 15 additions & 1 deletion script.js
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Original file line number Diff line number Diff line change
Expand Up @@ -30,7 +30,21 @@ const displayHandler = () => {
};

const appendText = (character) => {
operationString.innerHTML += character
checkRemoveOperator(operationString, character);
operationString.innerHTML += character;
}

function checkRemoveOperator(str, newChar) {
let operators = ["-", "+", "/", "*"];
let isOperator = false; //check is the last one is an operator
let isAnotherOperator = false; //check if the new one is an operator
for (const operator of operators){
if(str.innerHTML.slice(-1) == operator) isOperator = true;
}
for (const operator of operators){
if(newChar == operator) isAnotherOperator = true;
}
if (isOperator && isAnotherOperator) removeLastChar(); //if the new one and the last one are operators, remove last one
}

const removeLastChar = () => {
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