javascript操作文本节点的方法
appendText(text);
deleteData(offset, count);
insertData(offset, count);
replaceData(offset, count, text);
splitText(offset);
substringData(offset, count);
mannuan
Rome was not built in a day.
appendText(text);
deleteData(offset, count);
insertData(offset, count);
replaceData(offset, count, text);
splitText(offset);
substringData(offset, count);