[英]Javascript outer scope variable access
OperationSelector = function(selectElement) {
this.selectElement = selectElement;
}
OperationSelector.prototype.populateSelectWithData = function(xmlData) {
$(xmlData).find('operation').each(function() {
var operation = $(this);
selectElement.append('<option>' + operation.attr("title") + '</option>');
});
}
我怎么能在迭代塊中訪問OperationSelector.selectElement?
在迭代函數之前將其分配給函數作用域中的局部變量。 然后你可以在其中引用它:
OperationSelector = function(selectElement) {
this.selectElement = selectElement;
}
OperationSelector.prototype.populateSelectWithData = function(xmlData) {
var os = this;
$(xmlData).find('operation').each(function() {
var operation = $(this);
os.selectElement.append(new Option(operation.attr("title")));
});
}
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