onBeforeValueChange

fires before the value of a cell is changed

void onBeforeValueChange(number row,number column,string newValue,string oldValue){ ... };

Parameters

rownumberthe row id
columnnumberthe column id
newValuestringthe new value
oldValuestringthe old value

Example

$$("ssheet").attachEvent("onBeforeValueChange",function(row,column,newValue,oldValue){
    // your code here
    return true;
});

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