🍄ConditionalFormatRule
// cells in A1:B3 will turn red if 1 <= value <= 10
var sheet = SpreadsheetApp.getActiveSheet();
var range = sheet.getRange("A1:B3");
var rule = SpreadsheetApp
.newConditionalFormatRule() // ⭐️ ConditionalFormatRuleBuilder
.whenNumberBetween(1, 10) // - 🔸 condition
.setBackground("#FF0000") // - 🔸 formats
.setRanges([range]) // - 🔸 ranges
.build(); // ⭐️ ConditionalFormatRule
// append new rule to existing rules (instead of overwriting it)
var rules = sheet.getConditionalFormatRules();
rules.push(rule);
sheet.setConditionalFormatRules(rules);⭐️ 注意：
當使用 whenNumberBetween(start, end), whenNumberEqualTo(number) ... 等這些與數字相關的條件時，儲存格的值必須是「數字格式」才行，否則前面設的那些條件都沒有用❗️
SpreadsheetApp ⟩
range.setNumberFormat() - 使用條件時，要注意儲存格「值的格式」。
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